| Spiraea acuminata Douglas ex Hook. | Unresolved |  | RJP |  | 
	
		| Spiraea acuta hort. | Unresolved |  | RJP |  | 
	
		| Spiraea acutifolia Willd. | Synonym |  | RJP |  | 
	
		| Spiraea acutifolia hort. | Unresolved |  | RJP |  | 
	
		| Spiraea adiantifolia hort. ex W.Baxter | Unresolved |  | RJP |  | 
	
		| Spiraea adiantifolia hort. | Unresolved |  | RJP |  | 
	
		| Spiraea adiantoides Businský | Unresolved |  | WCSP (in review) |  | 
	
		| Spiraea aemiliana C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea aemiliana var. glabra H.Hara | Synonym |  | RJP |  | 
	
		| Spiraea aemiliana var. subcordata Toyok. | Synonym |  | RJP |  | 
	
		| Spiraea × aemula Zabel ex Koehne | Unresolved |  | RJP |  | 
	
		| Spiraea aemulans Rehder | Synonym |  | RJP |  | 
	
		| Spiraea affinis R.Parker | Unresolved |  | RJP |  | 
	
		| Spiraea aitchisonii Hemsl. | Unresolved |  | RJP |  | 
	
		| Spiraea alaschanica Y.Z.Zhao & T.J.Wang | Unresolved |  | RJP |  | 
	
		| Spiraea alba Du Roi | Accepted |  | RJP |  | 
	
		| Spiraea alba P.Watson | Unresolved |  | RJP |  | 
	
		| Spiraea alba var. alba | Synonym |  | RJP |  | 
	
		| Spiraea alba f. lanceolata (Torr. & A.Gray) C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea alba f. paniculata (Aiton) C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea alba var. septentrionalis (Fernald) F.Seym. | Synonym |  | RJP |  | 
	
		| Spiraea alba var. typica C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea albiflora (Miq.) Zabel | Synonym |  | RJP |  | 
	
		| Spiraea albiflora (Miq.) C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea alnifolia hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea alpestris G.Don | Unresolved |  | RJP |  | 
	
		| Spiraea alpina hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea alpina hort. Paris. | Unresolved |  | RJP |  | 
	
		| Spiraea alpina Korsh. | Unresolved |  | RJP |  | 
	
		| Spiraea alpina Pall. | Accepted |  | RJP |  | 
	
		| Spiraea alpina var. altaica Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea alpina var. dahurica Rupr. | Synonym |  | RJP |  | 
	
		| Spiraea altaica Pall. | Unresolved |  | RJP |  | 
	
		| Spiraea altaiensis Laxm. | Synonym |  | RJP |  | 
	
		| Spiraea amabilis Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea ambigua Pall. | Synonym |  | RJP |  | 
	
		| Spiraea amena Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea amena var. pauciflora Raf. | Synonym |  | RJP |  | 
	
		| Spiraea americana Michx. | Unresolved |  | RJP |  | 
	
		| Spiraea amoena Spae | Synonym |  | RJP |  | 
	
		| Spiraea amurensis Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea anatolica Hausskn. ex C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea angulata Fritsch ex C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea × angustifolia Dippel | Synonym |  | RJP |  | 
	
		| Spiraea angustifolia Otto & A.Dietr. | Unresolved |  | RJP |  | 
	
		| Spiraea angustifolia Mill. | Unresolved |  | RJP |  | 
	
		| Spiraea angustiloba Turcz. | Unresolved |  | RJP |  | 
	
		| Spiraea angustiloba Turcz. ex Fisch. & C.A.Mey. | Synonym |  | RJP |  | 
	
		| Spiraea anomala Batalin | Accepted |  | RJP |  | 
	
		| Spiraea aquilegiifolia Pall. | Synonym |  | RJP |  | 
	
		| Spiraea aquilegiifolia var. vanhouttei Briot | Synonym |  | RJP |  | 
	
		| Spiraea arborea (C.K.Schneid.) Bean | Synonym |  | RJP |  | 
	
		| Spiraea arborea var. glabrata (Rehder) Bean | Synonym |  | RJP |  | 
	
		| Spiraea arbuscula Greene | Synonym |  | RJP |  | 
	
		| Spiraea arbuscula var. pubigera C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea arctica hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea arcuata Hook.f. | Accepted |  | RJP |  | 
	
		| Spiraea arenaria Y.Z.Zhao & T.J.Wang | Synonym |  | RJP |  | 
	
		| Spiraea argentea hort. | Synonym |  | RJP |  | 
	
		| Spiraea argentea L.f. | Unresolved |  | RJP |  | 
	
		| Spiraea argentea Benth. | Unresolved |  | RJP |  | 
	
		| Spiraea argentea K.Koch | Synonym |  | RJP |  | 
	
		| Spiraea argentea W.Baxter | Unresolved |  | RJP |  | 
	
		| Spiraea argunensis Ledeb. | Unresolved |  | RJP |  | 
	
		| Spiraea argunensis Ledeb. ex Fisch. & C.A.Mey. | Unresolved |  | RJP |  | 
	
		| Spiraea arguta Hoffmanns. | Unresolved |  | RJP |  | 
	
		| Spiraea × arguta Zabel | Accepted |  | RJP |  | 
	
		| Spiraea ariaefolia Sm. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea ariifolia Sm. | Unresolved |  | RJP |  | 
	
		| Spiraea ariifolia var. discolor Torr. & A.Gray,p.p.5660 | Synonym |  | RJP |  | 
	
		| Spiraea ariifolia var. discolor Torr. & A.Gray,p.p.588 | Synonym |  | RJP |  | 
	
		| Spiraea arunachalensis Panigrahi & K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea aruncus Thunb. | Unresolved |  | RJP |  | 
	
		| Spiraea aruncus L. | Synonym |  | RJP |  | 
	
		| Spiraea aruncus Hook.f. | Unresolved |  | RJP |  | 
	
		| Spiraea aruncus Ledeb. | Unresolved |  | RJP |  | 
	
		| Spiraea aruncus var. americana Pers. | Unresolved |  | RJP |  | 
	
		| Spiraea aruncus var. astiloboides Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea × assimilis Zabel | Accepted |  | RJP |  | 
	
		| Spiraea assurgens (M.Vilm. & Bois) Bean | Unresolved |  | RJP |  | 
	
		| Spiraea astilboides T.Moore | Unresolved |  | RJP |  | 
	
		| Spiraea atemnophylla H.L‚v. | Synonym |  | RJP |  | 
	
		| Spiraea aubifolia hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea baldshuanica B.Fedtsch. | Accepted |  | RJP |  | 
	
		| Spiraea banatica Janka | Synonym |  | RJP |  | 
	
		| Spiraea barbata Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea barbata Wall. ex Cambess. | Unresolved |  | RJP |  | 
	
		| Spiraea beauverdiana Hult‚n | Unresolved |  | RJP |  | 
	
		| Spiraea beauverdiana auct. | Synonym |  | RJP |  | 
	
		| Spiraea beauverdiana C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea beauverdiana var. stevenii C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea belgica Dumort. | Synonym |  | RJP |  | 
	
		| Spiraea bella Sims | Accepted |  | RJP |  | 
	
		| Spiraea bella var. bella | Synonym |  | RJP |  | 
	
		| Spiraea bella var. subcordata Regel | Synonym |  | RJP |  | 
	
		| Spiraea × bellardii hort. | Unresolved |  | RJP |  | 
	
		| Spiraea belloides hort. | Synonym |  | RJP |  | 
	
		| Spiraea bernhardii hort. angl. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea besseriana Sweet | Unresolved |  | RJP |  | 
	
		| Spiraea bethlehemensis hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea bethlemensis hort. ex Wenz. | Unresolved |  | RJP |  | 
	
		| Spiraea betulaefolia P.Watson | Unresolved |  | RJP |  | 
	
		| Spiraea betulaefolia hort. Sanss. ex Petz. & G.Kirchn. | Unresolved |  | RJP |  | 
	
		| Spiraea betulifolia Pursh | Unresolved |  | RJP |  | 
	
		| Spiraea betulifolia Hook. | Unresolved |  | RJP |  | 
	
		| Spiraea betulifolia Pall. | Accepted |  | RJP |  | 
	
		| Spiraea betulifolia subsp. aemiliana (C.K.Schneid.) H.Hara | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. aemiliana (C.K.Schneid.) Koidz. | Accepted |  | RJP |  | 
	
		| Spiraea betulifolia var. betulifolia | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. concolor Nakai ex H.Hara | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. corymbosa (Raf.) Maxim. | Accepted |  | RJP |  | 
	
		| Spiraea betulifolia subsp. corymbosa (Raf.) R.L.Taylor & MacBryde | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. glabra (H.Hara) H.Hara | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia f. glabra (H.Hara) Ohwi | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia f. glaucina Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. grandifolia Tatew. | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia f. grandifolia (Nakai ex H.Hara) Toyok. | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. lucida (Douglas ex Hook.) C.L.Hitchc. | Accepted |  | RJP |  | 
	
		| Spiraea betulifolia subsp. lucida (Douglas ex Greene) R.L.Taylor & MacBryde | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. oblanceolata Tatew. | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. ochroleuca Zabel | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. rosea A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. subcordata (Toyok.) Toyok. | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. typica C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia var. yoshitakae Toyok. | Synonym |  | RJP |  | 
	
		| Spiraea betulifolia f. yoshitakae (Toyok.) Toyok. | Synonym |  | RJP |  | 
	
		| Spiraea billardierei hort. ex Zabel [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea billardii Meehan | Unresolved |  | RJP |  | 
	
		| Spiraea billardii hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea × billardii Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea billardii hort. ex Zabel [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea × billardii auct. | Synonym |  | RJP |  | 
	
		| Spiraea × billardii hort. ex K. Koch | Accepted |  | TRO |  | 
	
		| Spiraea × billiardii H‚rincq | Accepted |  | RJP |  | 
	
		| Spiraea × blanda Zabel | Accepted |  | RJP |  | 
	
		| Spiraea blumei G.Don | Accepted |  | RJP |  | 
	
		| Spiraea blumei var. amabilis (Koidz.) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea blumei f. amabilis (Koidz.) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea blumei var. blumei | Synonym |  | RJP |  | 
	
		| Spiraea blumei var. hayatae (Koidz.) Ohwi | Accepted |  | RJP |  | 
	
		| Spiraea blumei var. hirsuta Hemsl. | Synonym |  | RJP |  | 
	
		| Spiraea blumei var. maximowicziana (C.K.Schneid.) Dunn | Synonym |  | RJP |  | 
	
		| Spiraea blumei var. maximowiczii (C.K. Schneid.) Dunn | Synonym |  | TRO |  | 
	
		| Spiraea blumei f. obtusa (Nakai) Kit. | Synonym |  | RJP |  | 
	
		| Spiraea blumei var. obtusata (Nakai) Sugim. | Accepted |  | RJP |  | 
	
		| Spiraea blumei var. pubescens (Koidz.) Ohwi | Accepted |  | RJP |  | 
	
		| Spiraea blumei var. rotundifolia Hemsl. | Synonym |  | RJP |  | 
	
		| Spiraea bodinieri H.L‚v. | Unresolved |  | RJP |  | 
	
		| Spiraea boissieri C.K.Schneid. | Unresolved |  | RJP |  | 
	
		| Spiraea boursieri CarriŠre | Unresolved |  | RJP |  | 
	
		| Spiraea × brachybotrys Lange | Accepted |  | RJP |  | 
	
		| Spiraea × brachystachys Dippel,p.p.16779 | Unresolved |  | RJP |  | 
	
		| Spiraea × brachystachys Dippel,p.p.16734 | Unresolved |  | RJP |  | 
	
		| Spiraea bracteata Zabel | Synonym |  | RJP |  | 
	
		| Spiraea bracteata Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea bracteata Hook.f. | Synonym |  | RJP |  | 
	
		| Spiraea bracteata var. tosaensis Makino | Synonym |  | RJP |  | 
	
		| Spiraea brahuica Boiss. | Unresolved |  | RJP |  | 
	
		| Spiraea brevipes Borb s | Unresolved |  | RJP |  | 
	
		| Spiraea × brumalis Lange | Accepted |  | RJP |  | 
	
		| Spiraea bullata Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea × bumalda Burv. | Accepted |  | RJP |  | 
	
		| Spiraea × bumalda f. froebelii (Froebel) Rehder | Accepted |  | RJP |  | 
	
		| Spiraea × bumalda var. froebelii Rehder | Synonym |  | RJP |  | 
	
		| Spiraea × bumalda f. pruhoniciana (Kriechb.) Rehder | Accepted |  | RJP |  | 
	
		| Spiraea caerulescens Poir. | Unresolved |  | RJP |  | 
	
		| Spiraea caespitosa Nutt. ex Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea caespitosa var. elatior S. Watson | Synonym |  | TRO |  | 
	
		| Spiraea calcicola W.W.Sm. | Accepted |  | RJP |  | 
	
		| Spiraea californica hort. gall. ex Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea californica hort. gall. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea californica hort. | Unresolved |  | RJP |  | 
	
		| Spiraea californica Torr. | Synonym |  | RJP |  | 
	
		| Spiraea callosa Wall. | Synonym |  | RJP |  | 
	
		| Spiraea callosa Lindl. & Paxton | Unresolved |  | RJP |  | 
	
		| Spiraea callosa Hook.f. | Unresolved |  | RJP |  | 
	
		| Spiraea callosa Thunb. | Synonym |  | RJP |  | 
	
		| Spiraea callosa var. albiflora Miq. | Synonym |  | RJP |  | 
	
		| Spiraea callosa var. glabra Regel | Synonym |  | RJP |  | 
	
		| Spiraea callosa var. macrophylla Hook.f. & Thomson ex Hook.f. | Synonym |  | RJP |  | 
	
		| Spiraea callosa var. pubescens Regel | Synonym |  | RJP |  | 
	
		| Spiraea callosa var. robusta Hook.f. & Thomson | Unresolved |  | RJP |  | 
	
		| Spiraea callosa var. semperflorens hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea callosa var. superba Froebel | Synonym |  | RJP |  | 
	
		| Spiraea camschatica Wall. | Synonym |  | RJP |  | 
	
		| Spiraea camschatica auct. | Unresolved |  | RJP |  | 
	
		| Spiraea camschatica Pall. | Synonym |  | RJP |  | 
	
		| Spiraea camschatica var. himalensis Lindl. | Synonym |  | RJP |  | 
	
		| Spiraea camtschatica Pall. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea camtschatica var. occidentalis (S. Watson) Wenz. | Synonym |  | TRO |  | 
	
		| Spiraea cana Waldst. & Kit. | Accepted |  | RJP |  | 
	
		| Spiraea cana var. typica Beck | Synonym |  | RJP |  | 
	
		| Spiraea canadensis hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea canadensis Fisch. ex Steud. | Unresolved |  | RJP |  | 
	
		| Spiraea canescens D.Don | Accepted |  | RJP |  | 
	
		| Spiraea canescens var. canescens | Synonym |  | RJP |  | 
	
		| Spiraea canescens var. glabra Hook.f. & Thomson | Synonym |  | RJP |  | 
	
		| Spiraea canescens var. glaucophylla Franch. | Accepted |  | RJP |  | 
	
		| Spiraea canescens var. myrtifolia Zabel | Synonym |  | RJP |  | 
	
		| Spiraea canescens var. oblanceolata Rehder | Synonym |  | RJP |  | 
	
		| Spiraea canescens var. sulfurea Diels | Synonym |  | RJP |  | 
	
		| Spiraea canescens var. sulphurea Batalin | Synonym |  | RJP |  | 
	
		| Spiraea cantoniensis Lour. | Accepted |  | RJP |  | 
	
		| Spiraea cantoniensis var. cantoniensis | Synonym |  | RJP |  | 
	
		| Spiraea cantoniensis var. florepleno Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea cantoniensis var. jiangxiensis (Z.X.Yu) L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea cantoniensis f. lanceata (Zabel) Zabel | Accepted |  | RJP |  | 
	
		| Spiraea cantoniensis var. lanceata Zabel | Synonym |  | RJP |  | 
	
		| Spiraea cantoniensis f. lanceolata Zabel [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea capitata Pursh | Synonym |  | RJP |  | 
	
		| Spiraea carnea (Aiton) Steud. | Unresolved |  | RJP |  | 
	
		| Spiraea caroliniana Marshall | Synonym |  | RJP |  | 
	
		| Spiraea carpinifolia Willd. | Unresolved |  | RJP |  | 
	
		| Spiraea cavaleriei H.L‚v. | Accepted |  | RJP |  | 
	
		| Spiraea cavanillesii Gand. | Synonym |  | RJP |  | 
	
		| Spiraea ceanothifolia Hornem. | Unresolved |  | RJP |  | 
	
		| Spiraea chailarensis Liou [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea chamaedrifolia Siebold ex Blume | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedrifolia Cambess. | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedrifolia Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedrifolia Pall. | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedrifolia F.Schmidt | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedrifolia var. vulgaris Cambess. | Synonym |  | RJP |  | 
	
		| Spiraea chamaedryfolia Jacq. | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedryfolia Cham. & Schltdl. | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedryfolia Ledeb. | Unresolved |  | RJP |  | 
	
		| Spiraea chamaedryfolia L. | Accepted |  | RJP |  | 
	
		| Spiraea chamaedryfolia var. flexuosa (Fisch. ex Cambess.) Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea chamaedryfolia var. pilosa (Nakai) H.Hara | Accepted |  | RJP |  | 
	
		| Spiraea chamaedryfolia var. pubescens H.Hara | Synonym |  | RJP |  | 
	
		| Spiraea chamaedryfolia var. stenophylla Zabel | Accepted |  | RJP |  | 
	
		| Spiraea chamaedryfolia var. typica Fiori | Synonym |  | RJP |  | 
	
		| Spiraea chamaedryfolia subsp. ulmifolia (Scop.) J.Duvign. | Synonym |  | RJP |  | 
	
		| Spiraea chamaedryfolia var. ulmifolia (Scop.) Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea chambaensis K.M.Purohit & Panigrahi | Unresolved |  | RJP |  | 
	
		| Spiraea chartacea Nakai | Accepted |  | RJP |  | 
	
		| Spiraea chinensis Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea chinensis var. angustifolia (Yatabe) Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea ciliata Raf. | Synonym |  | RJP |  | 
	
		| Spiraea cinerascens Piper | Synonym |  | RJP |  | 
	
		| Spiraea × cinerea Zabel | Accepted |  | RJP |  | 
	
		| Spiraea coerulescens Poir. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea compsophylla Hand.-Mazz. | Accepted |  | RJP |  | 
	
		| Spiraea × concinna Zabel | Accepted |  | RJP |  | 
	
		| Spiraea × conferta Zabel | Synonym |  | RJP |  | 
	
		| Spiraea confusa hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea confusa Regel & K”rn. | Synonym |  | RJP |  | 
	
		| Spiraea confusa var. subglabra Regel | Synonym |  | RJP |  | 
	
		| Spiraea × conspicua Zabel ex Dieck | Accepted |  | RJP |  | 
	
		| Spiraea × conspicua Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea × constantia R.I.Schr”d. | Unresolved |  | RJP |  | 
	
		| Spiraea constantiae hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea contorta Stokes | Synonym |  | RJP |  | 
	
		| Spiraea convexa Suksd. | Unresolved |  | RJP |  | 
	
		| Spiraea corymbosa Torr. & A.Gray | Unresolved |  | RJP |  | 
	
		| Spiraea corymbosa Muhl. | Unresolved |  | RJP |  | 
	
		| Spiraea corymbosa hort. | Unresolved |  | RJP |  | 
	
		| Spiraea corymbosa Raf. | Synonym |  | RJP |  | 
	
		| Spiraea corymbosa var. lucida (Douglas ex Greene) A. Zobel | Synonym |  | TRO |  | 
	
		| Spiraea crataegifolia hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea crataegifolia Link | Unresolved |  | RJP |  | 
	
		| Spiraea crataegifolia hort. | Synonym |  | RJP |  | 
	
		| Spiraea crataegina hort. ex Petz. & G.Kirchn. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata Pall. | Synonym |  | RJP |  | 
	
		| Spiraea crenata L. | Accepted |  | RJP |  | 
	
		| Spiraea crenata Schmidt | Synonym |  | RJP |  | 
	
		| Spiraea crenata Muhl. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata Pall. ex M.Bieb. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata Cav. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata Besser ex Ser. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata Pamp. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata hort. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata Mert. | Unresolved |  | RJP |  | 
	
		| Spiraea crenata auct. | Synonym |  | RJP |  | 
	
		| Spiraea crenata subsp. crenata | Synonym |  | RJP |  | 
	
		| Spiraea crenata var. folia-ovatis Thunb. | Synonym |  | RJP |  | 
	
		| Spiraea crenata var. hispanica Willd. | Synonym |  | RJP |  | 
	
		| Spiraea crenata var. latioribus Thunb. | Synonym |  | RJP |  | 
	
		| Spiraea crenata subsp. parvifolia (Pau) Romo | Accepted |  | RJP |  | 
	
		| Spiraea crenata var. parvifolia Pau | Synonym |  | RJP |  | 
	
		| Spiraea crenata f. puberula Litv. | Synonym |  | RJP |  | 
	
		| Spiraea crenifolia (L.) Boiss. | Unresolved |  | RJP |  | 
	
		| Spiraea crenifolia auct. | Unresolved |  | RJP |  | 
	
		| Spiraea crenifolia C.A.Mey. | Synonym |  | RJP |  | 
	
		| Spiraea crenifolia var. capitata Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea crenifolia f. glaberrima Korsh. | Synonym |  | RJP |  | 
	
		| Spiraea crenifolia f. glabrata Litv. | Synonym |  | RJP |  | 
	
		| Spiraea crenifolia var. mongolica Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea crenifolia var. pallasiana Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea crenifolia var. parvifolia (Pau) C.Vicioso | Synonym |  | RJP |  | 
	
		| Spiraea crispifolia hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea cuneata hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea cuneata Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea cuneifolia Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea cuneifolia Borkh. | Synonym |  | RJP |  | 
	
		| Spiraea cuneifolia Wender. ex Steud. | Unresolved |  | RJP |  | 
	
		| Spiraea cuneifolia Sess‚ & Mo‡. | Unresolved |  | RJP |  | 
	
		| Spiraea cuneifolia Sennen & T.S.Elias | Synonym |  | RJP |  | 
	
		| Spiraea cuneifolia Wender. | Unresolved |  | RJP |  | 
	
		| Spiraea cuneifolia hort. | Unresolved |  | RJP |  | 
	
		| Spiraea cuneifolia Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea cuneifolia Wall. ex Cambess. | Synonym |  | RJP |  | 
	
		| Spiraea cuspidata Hoffmanns. | Unresolved |  | RJP |  | 
	
		| Spiraea dahurica (Rupr.) Maxim. | Accepted |  | RJP |  | 
	
		| Spiraea dalmatica Gand. | Unresolved |  | RJP |  | 
	
		| Spiraea daochengensis L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea darjeelingensis Panigrahi & K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea dasyantha Hemsl. | Unresolved |  | RJP |  | 
	
		| Spiraea dasyantha Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea dasyantha Bunge | Accepted |  | RJP |  | 
	
		| Spiraea dasyantha var. angustifolia Yatabe | Synonym |  | RJP |  | 
	
		| Spiraea dasyantha var. typica C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea dasyantha var. waurana C.K.Schneid. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea dasyantha var. wawrana C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea daurica Raf. | Synonym |  | RJP |  | 
	
		| Spiraea daurica hort. angl. ex Steud. | Unresolved |  | RJP |  | 
	
		| Spiraea decumbens hort. | Unresolved |  | RJP |  | 
	
		| Spiraea decumbens W.D.J.Koch | Accepted |  | RJP |  | 
	
		| Spiraea decumbens var. bellunensis Bizz. | Synonym |  | RJP |  | 
	
		| Spiraea decumbens subsp. decumbens | Synonym |  | RJP |  | 
	
		| Spiraea decumbens var. glabra Pokorny | Synonym |  | RJP |  | 
	
		| Spiraea decumbens var. hacquetii (Fenzl & K.Koch) Nyman | Synonym |  | RJP |  | 
	
		| Spiraea decumbens var. lancifolia (Hoffmanns.) Nyman | Synonym |  | RJP |  | 
	
		| Spiraea decumbens subsp. tomentosa (Poech) Dost l | Accepted |  | RJP |  | 
	
		| Spiraea decumbens var. tomentosa Poech | Synonym |  | RJP |  | 
	
		| Spiraea densiflora Nutt. ex Rydb. | Accepted |  | RJP |  | 
	
		| Spiraea densiflora Nutt. ex Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea densiflora var. densiflora | Synonym |  | TRO |  | 
	
		| Spiraea densiflora subsp. densiflora | Synonym |  | TRO |  | 
	
		| Spiraea densiflora subsp. splendens (Baumann ex K.Koch) Abrams | Synonym |  | RJP |  | 
	
		| Spiraea densiflora var. splendens (Baumann ex K.Koch) C.L.Hitchc. | Synonym |  | RJP |  | 
	
		| Spiraea denticulata Raf. | Synonym |  | RJP |  | 
	
		| Spiraea denudata J.Presl & C.Presl | Synonym |  | RJP |  | 
	
		| Spiraea × difformis Zabel | Accepted |  | RJP |  | 
	
		| Spiraea digitata Willd. | Synonym |  | RJP |  | 
	
		| Spiraea digitata var. angustiloba (Turcz. ex Fisch., C.A.Mey. & Av‚-Lall.) Glehn | Synonym |  | RJP |  | 
	
		| Spiraea digitata var. glabra Ledeb. | Synonym |  | RJP |  | 
	
		| Spiraea digitata var. intermedia Glehn,p.p.7058 | Synonym |  | RJP |  | 
	
		| Spiraea digitata var. intermedia Glehn,p.p.7057 | Synonym |  | RJP |  | 
	
		| Spiraea digitata var. latiloba Glehn | Synonym |  | RJP |  | 
	
		| Spiraea digitata var. tomentosa Ledeb. | Synonym |  | RJP |  | 
	
		| Spiraea discolor Torr. | Synonym |  | RJP |  | 
	
		| Spiraea discolor W.H.Brewer & S.Watson | Unresolved |  | RJP |  | 
	
		| Spiraea discolor Pursh | Synonym |  | RJP |  | 
	
		| Spiraea discolor var. ariifolia (Sm.) S.Watson | Unresolved |  | RJP |  | 
	
		| Spiraea discolor var. dumosa (Nutt. ex Torr. & A.Gray) S.Watson | Synonym |  | RJP |  | 
	
		| Spiraea discolor var. glabrescens Greenm. | Unresolved |  | RJP |  | 
	
		| Spiraea dissomorpha Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea diversifolia Dunn | Unresolved |  | RJP |  | 
	
		| Spiraea douglasii Hook. | Accepted |  | RJP |  | 
	
		| Spiraea douglasii var. douglasii | Synonym |  | RJP |  | 
	
		| Spiraea douglasii subsp. douglasii | Synonym |  | RJP |  | 
	
		| Spiraea douglasii f. douglasii | Synonym |  | TRO |  | 
	
		| Spiraea douglasii var. menziesii (Hook.) C.Presl | Synonym |  | RJP |  | 
	
		| Spiraea douglasii subsp. menziesii (Hook.) Calder & R.L.Taylor | Accepted |  | RJP |  | 
	
		| Spiraea douglasii var. nobleana (Hook.f.) S.Watson | Synonym |  | RJP |  | 
	
		| Spiraea douglasii var. roseata (Rydb.) C.L.Hitchc. | Synonym |  | RJP |  | 
	
		| Spiraea dubia Steud. | Unresolved |  | RJP |  | 
	
		| Spiraea dumosa Nutt. ex Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea dumosa Nutt. ex Hook. | Unresolved |  | RJP |  | 
	
		| Spiraea dumosa Nutt. ex Torr. | Unresolved |  | RJP |  | 
	
		| Spiraea duthieana Zinserl. | Unresolved |  | RJP |  | 
	
		| Spiraea elegans Pojark. | Accepted |  | RJP |  | 
	
		| Spiraea elliptica hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea elliptica Sess‚ & Mo‡. | Unresolved |  | RJP |  | 
	
		| Spiraea emarginata K.M.Purohit & Panigrahi | Unresolved |  | RJP |  | 
	
		| Spiraea erectistyla E.Reid | Unresolved |  | RJP |  | 
	
		| Spiraea esquirolii H.L‚v. | Unresolved |  | RJP |  | 
	
		| Spiraea exima hort. | Unresolved |  | RJP |  | 
	
		| Spiraea × eximia Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea eximia hort. ex Regel | Unresolved |  | RJP |  | 
	
		| Spiraea × eximia K.Koch | Synonym |  | RJP |  | 
	
		| Spiraea expansa Wall. | Synonym |  | RJP |  | 
	
		| Spiraea expansa hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea expansa Wall. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea expansa auct. mult. | Unresolved |  | RJP |  | 
	
		| Spiraea fastigiata Wall. ex C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea fastigiata Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea fauriana C.K.Schneid. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea faurieana C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea fauriei H.L‚v. | Unresolved |  | RJP |  | 
	
		| Spiraea ferganensis Pojark. | Unresolved |  | RJP |  | 
	
		| Spiraea ferruginea Raf. | Synonym |  | RJP |  | 
	
		| Spiraea fetulifolia T.Kawamoto | Synonym |  | RJP |  | 
	
		| Spiraea filipendula L. | Synonym |  | RJP |  | 
	
		| Spiraea filipendula var. minor Gouan ex Cambess. | Synonym |  | RJP |  | 
	
		| Spiraea filipendula var. pubescens (DC.) Cambess. | Synonym |  | RJP |  | 
	
		| Spiraea filipendula var. vulgaris Cambess. | Synonym |  | RJP |  | 
	
		| Spiraea filipendulina hort. ex Vilm. | Unresolved |  | RJP |  | 
	
		| Spiraea fissa Lindl. | Unresolved |  | RJP |  | 
	
		| Spiraea fissa hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea flabellata Bertol. ex Guss. | Synonym |  | RJP |  | 
	
		| Spiraea flabellata var. crenata (Cav.) Nyman | Synonym |  | RJP |  | 
	
		| Spiraea flagellaris hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea flagellaris hort. | Synonym |  | RJP |  | 
	
		| Spiraea flagellata hort. ex Rehder | Synonym |  | RJP |  | 
	
		| Spiraea flagellata hort. | Unresolved |  | RJP |  | 
	
		| Spiraea flagelliformis hort. | Synonym |  | RJP |  | 
	
		| Spiraea flagelliformis hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea flagelliformis hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea flexuosa Rchb. | Synonym |  | RJP |  | 
	
		| Spiraea flexuosa Raf. | Synonym |  | RJP |  | 
	
		| Spiraea flexuosa hort. | Unresolved |  | RJP |  | 
	
		| Spiraea flexuosa Fisch. ex Cambess. | Synonym |  | RJP |  | 
	
		| Spiraea flexuosa var. stenophylla C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea flexuosa var. typica C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea floribunda hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea foliosa Poir. | Synonym |  | RJP |  | 
	
		| Spiraea × fontenaysi hort. Billiard ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea × fontenaysiensis Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea × fontenaysii Lebas | Accepted |  | RJP |  | 
	
		| Spiraea × fontenaysii Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea × fontenaysii f. alba Zabel | Accepted |  | RJP |  | 
	
		| Spiraea formosa hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea formosana Hayata | Accepted |  | RJP |  | 
	
		| Spiraea formosana var. brevistyla Hayata | Synonym |  | RJP |  | 
	
		| Spiraea fortunei Planch. | Synonym |  | RJP |  | 
	
		| Spiraea fortunei var. semperflorens hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea fortunei var. subpaniculata Jacques | Synonym |  | RJP |  | 
	
		| Spiraea × foxii hort. ex Zabel | Accepted |  | RJP |  | 
	
		| Spiraea foxii hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea fritschiana C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea fritschiana var. angulata (Fritsch ex C.K.Schneid.) Rehder | Synonym |  | RJP |  | 
	
		| Spiraea fritschiana var. fritschiana | Unresolved |  | RJP |  | 
	
		| Spiraea fritschiana var. obtusifolia Nakai | Unresolved |  | RJP |  | 
	
		| Spiraea fritschiana var. villosa Y.Q.Zhu & D.K.Zang | Synonym |  | RJP |  | 
	
		| Spiraea × fulvescens Dippel | Accepted |  | RJP |  | 
	
		| Spiraea fulvescens auct. | Synonym |  | RJP |  | 
	
		| Spiraea fulvescens Rehder | Synonym |  | RJP |  | 
	
		| Spiraea gemmata Zabel | Synonym |  | RJP |  | 
	
		| Spiraea × gieseleriana Zabel | Accepted |  | RJP |  | 
	
		| Spiraea gigantea Gand. | Synonym |  | RJP |  | 
	
		| Spiraea gigantea hort. | Synonym |  | RJP |  | 
	
		| Spiraea glabrata Lange | Unresolved |  | RJP |  | 
	
		| Spiraea glauca Schultz | Synonym |  | RJP |  | 
	
		| Spiraea glauca Raf. | Synonym |  | RJP |  | 
	
		| Spiraea glauca Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea glomerata Raf. | Synonym |  | RJP |  | 
	
		| Spiraea glutinosa (Rydb.) Fedde | Unresolved |  | RJP |  | 
	
		| Spiraea gracilis Maxim. | Accepted |  | RJP |  | 
	
		| Spiraea grandiflora G.Lodd. | Synonym |  | RJP |  | 
	
		| Spiraea grandiflora hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea grandiflora Hook. | Synonym |  | RJP |  | 
	
		| Spiraea grandiflora Sweet | Synonym |  | RJP |  | 
	
		| Spiraea grandifolia Nakai ex H.Hara | Synonym |  | RJP |  | 
	
		| Spiraea grandifolia Nakai | Unresolved |  | RJP |  | 
	
		| Spiraea × grata Dippel | Synonym |  | RJP |  | 
	
		| Spiraea grefsheimii Tzvelev | Unresolved |  | RJP |  | 
	
		| Spiraea grossulariifolia hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea grossulariifolia hort. | Unresolved |  | RJP |  | 
	
		| Spiraea hacquetii Fenzl & K.Koch | Synonym |  | RJP |  | 
	
		| Spiraea hailarensis Liou | Accepted |  | RJP |  | 
	
		| Spiraea hartwegiana Rydb. | Unresolved |  | RJP |  | 
	
		| Spiraea hayatae Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea hayatae var. pubescens Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea hayatana H.L.Li | Accepted |  | RJP |  | 
	
		| Spiraea hazarica R.Parker | Unresolved |  | RJP |  | 
	
		| Spiraea helleri Rydb. | Unresolved |  | RJP |  | 
	
		| Spiraea hemicryptophyta Grierson | Unresolved |  | RJP |  | 
	
		| Spiraea hendersonii (Canby) Piper | Synonym |  | RJP |  | 
	
		| Spiraea henryi Hemsl. | Accepted |  | RJP |  | 
	
		| Spiraea henryi var. glabrata T.T.Yu & L.T.Lu | Synonym |  | RJP |  | 
	
		| Spiraea henryi var. henryi | Synonym |  | RJP |  | 
	
		| Spiraea henryi var. notabilis Farquhar | Synonym |  | RJP |  | 
	
		| Spiraea henryi f. notabilis (Farquhar) Rehder | Accepted |  | RJP |  | 
	
		| Spiraea henryi var. omeiensis Y.Y.Fang ex T.T.Yu | Accepted |  | RJP |  | 
	
		| Spiraea heterophylla Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea himalayea hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea hingshanensis T.T.Yu & L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea hirsuta (Hemsl.) C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea hirsuta var. hirsuta | Synonym |  | RJP |  | 
	
		| Spiraea hirsuta var. rotundifolia (Hemsl.) Rehder | Accepted |  | RJP |  | 
	
		| Spiraea hispanica (Willd.) Hoffmanns. & Link | Synonym |  | RJP |  | 
	
		| Spiraea hispanica Barrelier ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea hispanica Ortega | Synonym |  | RJP |  | 
	
		| Spiraea hispanica Ortega ex C.Vicioso | Synonym |  | RJP |  | 
	
		| Spiraea hispanica var. rhodoclada (Leresche & Levier) Losa | Synonym |  | RJP |  | 
	
		| Spiraea × hitchcockii W.J.Hess | Unresolved |  | RJP |  | 
	
		| Spiraea holorhodantha H. Lév. | Synonym |  | TRO |  | 
	
		| Spiraea hookeri hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea hookeri hort. ex Petz. & G.Kirchn. | Synonym |  | RJP |  | 
	
		| Spiraea hookeri hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea hookeri hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea hookeriana Raf. | Synonym |  | RJP |  | 
	
		| Spiraea humanni hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea humboldtii hort. | Unresolved |  | RJP |  | 
	
		| Spiraea humboldtii Spae | Unresolved |  | RJP |  | 
	
		| Spiraea humboldtii hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea humilis Pojark. | Synonym |  | RJP |  | 
	
		| Spiraea hybrida Petz. & G.Kirchn. | Unresolved |  | RJP |  | 
	
		| Spiraea hydrangaefolia hort. | Synonym |  | RJP |  | 
	
		| Spiraea hydrangeaefolia hort. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea hydrophila Suksd. | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia L. | Accepted |  | RJP |  | 
	
		| Spiraea hypericifolia Sm. | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia M.Bieb. | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia Marshall | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia Kar. & Kir. | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia R.Parker | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia Turcz. | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia DC. | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia Nyman | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia Cambess. | Unresolved |  | RJP |  | 
	
		| Spiraea hypericifolia var. acuta Ser. | Accepted |  | RJP |  | 
	
		| Spiraea hypericifolia var. acutifolia (Willd.) Dippel | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia var. flabellata (Bertol. ex Guss.) Fiori | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia var. genuina Ledeb. | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia var. hispanica (Willd.) Fiori | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia var. hupehensis Rehder | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia subsp. hypericifolia | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia var. obovata (Waldst. & Kit. ex Willd.) Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia subsp. obovata (Waldst. & Kit. ex Willd.) H.Huber | Accepted |  | RJP |  | 
	
		| Spiraea hypericifolia var. plukenetiana Ser. | Synonym |  | RJP |  | 
	
		| Spiraea hypericifolia var. typica Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea hypoglauca Koidz. | Unresolved |  | RJP |  | 
	
		| Spiraea hypoleuca Dunn | Unresolved |  | RJP |  | 
	
		| Spiraea idahoensis A.Nelson | Unresolved |  | RJP |  | 
	
		| Spiraea incarnata hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea incisa hort. ex Rchb. | Unresolved |  | RJP |  | 
	
		| Spiraea incisa Thunb. | Synonym |  | RJP |  | 
	
		| Spiraea indica hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea inebrians hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea × inflexa hort. ex K.Koch | Accepted |  | RJP |  | 
	
		| Spiraea inflexa hort. | Unresolved |  | RJP |  | 
	
		| Spiraea integrifolia Pall. | Unresolved |  | RJP |  | 
	
		| Spiraea × intermedia hort. Lemoine ex Zabel | Accepted |  | RJP |  | 
	
		| Spiraea intermedia Lemoine | Synonym |  | RJP |  | 
	
		| Spiraea intermedia hort. | Unresolved |  | RJP |  | 
	
		| Spiraea italica Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea japonica Desv. | Synonym |  | RJP |  | 
	
		| Spiraea japonica Raf. | Synonym |  | RJP |  | 
	
		| Spiraea japonica Cambess. | Unresolved |  | RJP |  | 
	
		| Spiraea japonica Jacob-Makoy | Unresolved |  | RJP |  | 
	
		| Spiraea japonica L.f. | Accepted |  | RJP |  | 
	
		| Spiraea japonica var. acuminata Franch. | Synonym |  | RJP |  | 
	
		| Spiraea japonica f. albiflora (Miq.) Kitam. | Accepted |  | RJP |  | 
	
		| Spiraea japonica var. albiflora (Miq.) Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea japonica f. alpina (Maxim.) Koidz. | Accepted |  | RJP |  | 
	
		| Spiraea japonica var. alpina Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. angulata (Fritsch ex C.K.Schneid.) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea japonica f. atrosanguinea (hort. ex Zabel) C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea japonica var. atrosanguinea hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. bullata (Maxim.) Makino | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. bumalda Bean | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. formosana (Hayata) Masam. | Synonym |  | RJP |  | 
	
		| Spiraea japonica f. fortunei (Planch.) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. fortunei Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. fortunei (Planch.) Rehder | Synonym |  | RJP |  | 
	
		| Spiraea japonica subsp. glabra (Regel) Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. glabra (Regel) Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. japonica | Synonym |  | RJP |  | 
	
		| Spiraea japonica f. macrophylla (Zabel) Zabel | Accepted |  | RJP |  | 
	
		| Spiraea japonica var. macrophylla Zabel | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. mayebarai Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. morrisonicola (Hayata) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. ovatifolia Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. parvifolia (Koidz.) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea japonica f. pubescens (Regel) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. pubescens (Regel) Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea japonica f. ruberrima (hort. ex Zabel) C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea japonica var. ruberrima hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. tomentosa Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea japonica var. typica C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea jiangxiensis Z.X.Yu | Synonym |  | RJP |  | 
	
		| Spiraea kamaonensis hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea kamaonensis var. spicata Billiard ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea kamtschatica Maxim. | Unresolved |  | TRO |  | 
	
		| Spiraea kinashii Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea kirilowii Regel & Tiling | Synonym |  | RJP |  | 
	
		| Spiraea kiusiana Nakai | Synonym |  | RJP |  | 
	
		| Spiraea koreana Nakai | Synonym |  | RJP |  | 
	
		| Spiraea koreana var. macrogyna Nakai | Synonym |  | RJP |  | 
	
		| Spiraea koreana var. rosea Nakai | Synonym |  | RJP |  | 
	
		| Spiraea kwangsiensis T.T.Yu | Accepted |  | RJP |  | 
	
		| Spiraea kweichowensis T.T.Yu & L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea laciniata Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea laeta Rehder | Accepted |  | RJP |  | 
	
		| Spiraea laeta var. laeta | Synonym |  | RJP |  | 
	
		| Spiraea laevigata Maxim. ex Franch. & Sav. | Unresolved |  | RJP |  | 
	
		| Spiraea laevigata auct. | Unresolved |  | RJP |  | 
	
		| Spiraea laevigata L. | Synonym |  | RJP |  | 
	
		| Spiraea laevigata var. tianschanica Krasn. | Unresolved |  | RJP |  | 
	
		| Spiraea lanata hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea lanceolata Borkh. | Synonym |  | RJP |  | 
	
		| Spiraea lanceolata Comm. ex Poir. | Synonym |  | RJP |  | 
	
		| Spiraea lancifolia Hoffmanns. | Synonym |  | RJP |  | 
	
		| Spiraea lancifolia Maxim. | Unresolved |  | RJP |  | 
	
		| Spiraea lancifolia Hoffmanns. ex K.Koch | Synonym |  | RJP |  | 
	
		| Spiraea lancifolia var. decumbens (W.D.J.Koch) Fiori | Synonym |  | RJP |  | 
	
		| Spiraea lancifolia var. tomentosa (Poech) Pamp. | Synonym |  | RJP |  | 
	
		| Spiraea lasiocarpa Kar. & Kir. | Accepted |  | RJP |  | 
	
		| Spiraea lasiocarpa Franch. | Unresolved |  | RJP |  | 
	
		| Spiraea lasiocarpa auct. | Unresolved |  | RJP |  | 
	
		| Spiraea latifolia (Sol.) Borkh. | Synonym |  | RJP |  | 
	
		| Spiraea latifolia var. septentrionalis Fernald | Synonym |  | RJP |  | 
	
		| Spiraea laucheana Koehne | Synonym |  | RJP |  | 
	
		| Spiraea laxiflora Lindl. | Synonym |  | RJP |  | 
	
		| Spiraea laxissima Koehne | Unresolved |  | RJP |  | 
	
		| Spiraea × lemoinei Zabel | Accepted |  | RJP |  | 
	
		| Spiraea lenneana hort. | Unresolved |  | RJP |  | 
	
		| Spiraea leucantha Lange | Synonym |  | RJP |  | 
	
		| Spiraea lichiangensis W.W.Sm. | Accepted |  | RJP |  | 
	
		| Spiraea limprichtii J.Krause | Unresolved |  | RJP |  | 
	
		| Spiraea lindleyana Wall. ex Lindl. | Synonym |  | RJP |  | 
	
		| Spiraea lindleyana Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea lindleyana Boiss. | Unresolved |  | RJP |  | 
	
		| Spiraea litwinowii Dobrocz. | Synonym |  | RJP |  | 
	
		| Spiraea lobata Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea lobata Murray | Unresolved |  | RJP |  | 
	
		| Spiraea lobata hort. | Unresolved |  | RJP |  | 
	
		| Spiraea lobata Gronov. ex Jacq. | Synonym |  | RJP |  | 
	
		| Spiraea lobata var. angustiloba Turcz. | Synonym |  | RJP |  | 
	
		| Spiraea lobulata T.T.Yu & L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea × longifolia Dippel | Synonym |  | RJP |  | 
	
		| Spiraea longigemmis Maxim. | Accepted |  | RJP |  | 
	
		| Spiraea lucida Douglas ex Hook. | Synonym |  | RJP |  | 
	
		| Spiraea lucida Douglas ex Greene | Unresolved |  | RJP |  | 
	
		| Spiraea lucida var. rosea (A.Gray) Greene | Synonym |  | RJP |  | 
	
		| Spiraea luxurians hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea luxuriosa Lavall‚e ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea × luxuriosa Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea lycioides R.Parker | Unresolved |  | RJP |  | 
	
		| Spiraea lycoctonifolia Maxim. | Unresolved |  | RJP |  | 
	
		| Spiraea macrophylla Hook. ex Koehne | Unresolved |  | RJP |  | 
	
		| Spiraea × macrothyrsa Dippel | Accepted |  | RJP |  | 
	
		| Spiraea magellanica Poir. | Unresolved |  | RJP |  | 
	
		| Spiraea × magnifica Dippel | Synonym |  | RJP |  | 
	
		| Spiraea mairei H.L‚v. | Accepted |  | RJP |  | 
	
		| Spiraea majestica Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea × margaritae Zabel | Accepted |  | RJP |  | 
	
		| Spiraea martini H. Lév. | Accepted |  | TRO |  | 
	
		| Spiraea martini var. martini | Synonym |  | TRO |  | 
	
		| Spiraea martinii H.L‚v. | Accepted |  | RJP |  | 
	
		| Spiraea martinii var. martinii | Synonym |  | RJP |  | 
	
		| Spiraea maximowicziana C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea media hort. | Unresolved |  | RJP |  | 
	
		| Spiraea media Schmidt | Accepted |  | RJP |  | 
	
		| Spiraea media subsp. cana (Waldst. & Kit.) Nov k | Synonym |  | RJP |  | 
	
		| Spiraea media var. glabrescens Simonk. | Synonym |  | RJP |  | 
	
		| Spiraea media f. glabrescens (Simonk.) Zabel | Accepted |  | RJP |  | 
	
		| Spiraea media subsp. media | Synonym |  | RJP |  | 
	
		| Spiraea media var. mollis (K.Koch & Bouch‚) C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea media var. monbetsuensis (Franch.) Cardot ex Nakai | Synonym |  | RJP |  | 
	
		| Spiraea media f. oblongifolia Beck | Synonym |  | RJP |  | 
	
		| Spiraea media var. oblongifolia hort. ex C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea media var. oblongifolia (Waldst. & Kit.) Dippel | Synonym |  | RJP |  | 
	
		| Spiraea media f. pilosiuscula Zabel | Synonym |  | RJP |  | 
	
		| Spiraea media subsp. polonica (Bl>locki) Dost l | Accepted |  | RJP |  | 
	
		| Spiraea media var. rotundifolia G.Nicholson | Synonym |  | RJP |  | 
	
		| Spiraea media var. sericea (Turcz.) Regel ex Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea media f. subintegerrima Zabel | Synonym |  | RJP |  | 
	
		| Spiraea menziesii Hook. | Synonym |  | RJP |  | 
	
		| Spiraea menziesii f. angustifolia Zabel | Synonym |  | RJP |  | 
	
		| Spiraea menziesii f. billiardii Billiard | Synonym |  | RJP |  | 
	
		| Spiraea menziesii f. eriophylla Zabel | Synonym |  | RJP |  | 
	
		| Spiraea menziesii f. eximia hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea menziesii f. lenneana hort. Petrop. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea menziesii f. macrothyrsa Zabel | Synonym |  | RJP |  | 
	
		| Spiraea menziesii f. triumphans hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea mexicana Schiede ex Regel | Unresolved |  | RJP |  | 
	
		| Spiraea mexicana hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea micrantha Hook.f. | Unresolved |  | RJP |  | 
	
		| Spiraea microgyna Nakai | Synonym |  | RJP |  | 
	
		| Spiraea microgyna var. velutina Nakai | Synonym |  | RJP |  | 
	
		| Spiraea × micropetala Zabel | Accepted |  | RJP |  | 
	
		| Spiraea microphylla Sennen & T.S.Elias | Synonym |  | RJP |  | 
	
		| Spiraea microphylla H.L‚v. | Synonym |  | RJP |  | 
	
		| Spiraea × microthyrsa Zabel | Accepted |  | RJP |  | 
	
		| Spiraea millefolium Torr. | Synonym |  | RJP |  | 
	
		| Spiraea miyabei Koidz. | Accepted |  | RJP |  | 
	
		| Spiraea miyajimensis Makino & Nemoto | Synonym |  | RJP |  | 
	
		| Spiraea mollifolia Rehder | Accepted |  | RJP |  | 
	
		| Spiraea mollifolia var. mollifolia | Synonym |  | RJP |  | 
	
		| Spiraea × mollis K.Koch & Bouch‚,p.p.11306 | Unresolved |  | RJP |  | 
	
		| Spiraea × mollis K.Koch & Bouch‚,p.p.11303 | Unresolved |  | RJP |  | 
	
		| Spiraea monbetsusensis Franch. | Unresolved |  | RJP |  | 
	
		| Spiraea mongolica (Maxim.) Koehne | Unresolved |  | RJP |  | 
	
		| Spiraea mongolica Maxim. | Accepted |  | RJP |  | 
	
		| Spiraea mongolica var. mongolica | Synonym |  | RJP |  | 
	
		| Spiraea mongolica var. pubescens Y.Z.Zhao & T.J.Wang | Synonym |  | RJP |  | 
	
		| Spiraea mongolica var. tomentulosa T.T.Yu | Accepted |  | RJP |  | 
	
		| Spiraea monogyna Torr. | Synonym |  | RJP |  | 
	
		| Spiraea montana hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea morrisonicola Hayata | Accepted |  | RJP |  | 
	
		| Spiraea muliensis T.T.Yu & L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea multifida Ledeb. | Unresolved |  | RJP |  | 
	
		| Spiraea × multiflora Zabel | Accepted |  | RJP |  | 
	
		| Spiraea multijuga Wenz. | Unresolved |  | RJP |  | 
	
		| Spiraea multijuga Makino ex Koidz. | Unresolved |  | RJP |  | 
	
		| Spiraea myrtifolia hort. ex Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea myrtilloides Rehder | Accepted |  | RJP |  | 
	
		| Spiraea myrtilloides var. myrtilloides | Synonym |  | RJP |  | 
	
		| Spiraea nana hort. ex Petz. & G.Kirchn. | Unresolved |  | RJP |  | 
	
		| Spiraea nankaiensis Nakai | Unresolved |  | RJP |  | 
	
		| Spiraea nanojaponica Tzvelev | Unresolved |  | RJP |  | 
	
		| Spiraea nayarii K.M.Purohit & Panigrahi | Unresolved |  | RJP |  | 
	
		| Spiraea nepalensis hort. ex C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea nepalensis Lodd. ex Loudon | Unresolved |  | RJP |  | 
	
		| Spiraea nepalensis hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea nepalensis hort. | Unresolved |  | RJP |  | 
	
		| Spiraea nervosa Franch. & Sav. | Accepted |  | RJP |  | 
	
		| Spiraea nervosa var. angustifolia (Yatabe) Ohwi | Synonym |  | RJP |  | 
	
		| Spiraea nervosa var. chinensis (Maxim.) Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea nervosa var. kiusiana (Nakai) Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea nervosa var. latifolia (Nakai) Kitam. | Synonym |  | RJP |  | 
	
		| Spiraea neumannii hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea nicoudiertii hort. ex Bosse | Synonym |  | RJP |  | 
	
		| Spiraea × nicoudiertii hort. ex Bosse | Unresolved |  | RJP |  | 
	
		| Spiraea nicoviensis Besser ex Link | Unresolved |  | RJP |  | 
	
		| Spiraea ningshiaensis T.T.Yu & L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea nipponica Maxim. | Accepted |  | RJP |  | 
	
		| Spiraea nipponica var. nipponica | Synonym |  | RJP |  | 
	
		| Spiraea nipponica f. oblanceolata (Nakai) Ohwi | Synonym |  | RJP |  | 
	
		| Spiraea nipponica var. oblanceolata Nakai | Synonym |  | RJP |  | 
	
		| Spiraea nipponica var. ogawae (Nakai) T.Yamanaka | Synonym |  | RJP |  | 
	
		| Spiraea nipponica f. rotundifolia (G.Nicholson) Makino | Synonym |  | RJP |  | 
	
		| Spiraea nipponica var. rotundifolia (G.Nicholson) Makino | Synonym |  | RJP |  | 
	
		| Spiraea nipponica var. tosaensis (Yatabe) Makino | Accepted |  | RJP |  | 
	
		| Spiraea nipponica f. typica Makino | Synonym |  | RJP |  | 
	
		| Spiraea nishimurae Kitag. | Accepted |  | RJP |  | 
	
		| Spiraea nivea hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea × nivea Zabel | Accepted |  | RJP |  | 
	
		| Spiraea × nobleana Hook.f. | Synonym |  | RJP |  | 
	
		| Spiraea × nobleana Zabel | Synonym |  | RJP |  | 
	
		| Spiraea nobleana hort. | Unresolved |  | RJP |  | 
	
		| Spiraea noeana Gand. | Synonym |  | RJP |  | 
	
		| Spiraea northcroftii I.M.Johnst. | Unresolved |  | RJP |  | 
	
		| Spiraea × notha Zabel ex Dieck | Accepted |  | RJP |  | 
	
		| Spiraea × notha Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea × nudiflora Zabel | Accepted |  | RJP |  | 
	
		| Spiraea nutans hort. ex C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea nutans hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea nutans Royle ex Steud. | Unresolved |  | RJP |  | 
	
		| Spiraea nutans hort. | Unresolved |  | RJP |  | 
	
		| Spiraea oblongata Wender. | Synonym |  | RJP |  | 
	
		| Spiraea oblongata hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea oblongifolia Waldst. & Kit. | Synonym |  | RJP |  | 
	
		| Spiraea × oblongifolia Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea oblongifolia Ledeb. | Unresolved |  | RJP |  | 
	
		| Spiraea oblongifolia Regel ex Maxim. | Unresolved |  | RJP |  | 
	
		| Spiraea oblongifolia auct. | Synonym |  | RJP |  | 
	
		| Spiraea obovata Waldst. & Kit. ex Willd. | Synonym |  | RJP |  | 
	
		| Spiraea obovata Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea obovata Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea obovata Grossh. | Unresolved |  | RJP |  | 
	
		| Spiraea obovata Rchb. | Unresolved |  | RJP |  | 
	
		| Spiraea obovata var. cavanillesii (Gand.) Braun-Blanq. | Synonym |  | RJP |  | 
	
		| Spiraea obovata var. rhodoclada (Leresche & Levier) Braun-Blanq. | Synonym |  | RJP |  | 
	
		| Spiraea obtusa Nakai | Synonym |  | RJP |  | 
	
		| Spiraea obtusa var. latifolia T.Kawamoto | Synonym |  | RJP |  | 
	
		| Spiraea obtusata Nakai [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea obtusiloba Opiz | Unresolved |  | RJP |  | 
	
		| Spiraea occidentalis S.Watson | Synonym |  | RJP |  | 
	
		| Spiraea odorata Gray | Synonym |  | RJP |  | 
	
		| Spiraea ogawae Nakai | Synonym |  | RJP |  | 
	
		| Spiraea omeiensis Y.Y.Fang | Unresolved |  | RJP |  | 
	
		| Spiraea opulifolia Pall. | Unresolved |  | RJP |  | 
	
		| Spiraea opulifolia L. | Synonym |  | RJP |  | 
	
		| Spiraea opulifolia var. ferruginea Nutt. ex Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea opulifolia var. mollis Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea opulifolia var. multiflora Durand | Synonym |  | RJP |  | 
	
		| Spiraea opulifolia var. parvifolia A.Gray ex Porter & J.M.Coult. | Synonym |  | RJP |  | 
	
		| Spiraea opulifolia var. pauciflora Torr. & A. Gray | Synonym |  | TRO |  | 
	
		| Spiraea opulifolia var. tomentella Ser. | Synonym |  | RJP |  | 
	
		| Spiraea opulifolia var. tomentosa Hook. ex Raf. | Synonym |  | RJP |  | 
	
		| Spiraea orbicularis Hoffmanns. | Synonym |  | RJP |  | 
	
		| Spiraea ostryfolia Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea ouensanensis H.L‚v. | Synonym |  | RJP |  | 
	
		| Spiraea ovalifolia hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea ovalis Rehder | Accepted |  | RJP |  | 
	
		| Spiraea ovata Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea ovata Van Houtte ex Regel | Unresolved |  | RJP |  | 
	
		| Spiraea ovata hort. | Unresolved |  | RJP |  | 
	
		| Spiraea × oxyodon Zabel | Accepted |  | RJP |  | 
	
		| Spiraea pachysandra hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea × pachystachys K.Koch | Accepted |  | RJP |  | 
	
		| Spiraea × pachystachys hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea pachystachys hort. ex Worsley | Unresolved |  | RJP |  | 
	
		| Spiraea pachystachys hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea pallasii G.Don | Synonym |  | RJP |  | 
	
		| Spiraea pallasii hort. Petrop. | Unresolved |  | RJP |  | 
	
		| Spiraea × pallidiflora Zabel | Accepted |  | RJP |  | 
	
		| Spiraea pallidiflora Zabel ex Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea palmata Thunb.,p.p.7073 | Synonym |  | RJP |  | 
	
		| Spiraea palmata Thunb.,p.p.1070 | Synonym |  | RJP |  | 
	
		| Spiraea palmata L. | Synonym |  | RJP |  | 
	
		| Spiraea palmata auct. | Synonym |  | RJP |  | 
	
		| Spiraea palmata Pall. | Synonym |  | RJP |  | 
	
		| Spiraea palustris (Moench) Salisb. | Synonym |  | RJP |  | 
	
		| Spiraea panchananii Panigrahi & K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea paniculata (Willd.) G.Don | Synonym |  | RJP |  | 
	
		| Spiraea paniculata St.-Lag. | Synonym |  | RJP |  | 
	
		| Spiraea panigrahiana K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea papillosa Rehder | Accepted |  | RJP |  | 
	
		| Spiraea papillosa var. papillosa | Synonym |  | RJP |  | 
	
		| Spiraea parkeri Panigrahi & K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea parvifolia Benth. | Unresolved |  | RJP |  | 
	
		| Spiraea parvifolia Bertol. | Synonym |  | RJP |  | 
	
		| Spiraea parvifolia Raf. | Synonym |  | RJP |  | 
	
		| Spiraea pectinata Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea × pikoviensis Besser | Accepted |  | RJP |  | 
	
		| Spiraea pikoviensis hort. | Unresolved |  | RJP |  | 
	
		| Spiraea pikoviensis auct. hung. | Synonym |  | RJP |  | 
	
		| Spiraea pikowiensis Simonk. | Unresolved |  | RJP |  | 
	
		| Spiraea pilosa Franch. | Accepted |  | RJP |  | 
	
		| Spiraea pinnata Moench | Synonym |  | RJP |  | 
	
		| Spiraea pinnata Blume | Unresolved |  | RJP |  | 
	
		| Spiraea pinnifolia Walp. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea pjassetzkii Buzunova | Unresolved |  | RJP |  | 
	
		| Spiraea polonica Bl>locki | Synonym |  | RJP |  | 
	
		| Spiraea praecox hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea prattii C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea procumbens hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea procumbens G.Kirchn. | Unresolved |  | RJP |  | 
	
		| Spiraea prostrata Schur | Synonym |  | RJP |  | 
	
		| Spiraea prostrata Maxim. | Accepted |  | RJP |  | 
	
		| Spiraea × pruhoniciana Kriechb. | Synonym |  | RJP |  | 
	
		| Spiraea × pruinosa hort. Muscav. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea pruinosa hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea pruinosa hort. | Unresolved |  | RJP |  | 
	
		| Spiraea pruniflora Honda | Synonym |  | RJP |  | 
	
		| Spiraea prunifolia Siebold & Zucc. | Accepted |  | RJP |  | 
	
		| Spiraea prunifolia var. florepleno Siebold | Synonym |  | RJP |  | 
	
		| Spiraea prunifolia var. hupehensis (Rehder) Rehder | Accepted |  | RJP |  | 
	
		| Spiraea prunifolia var. plena C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea prunifolia var. prunifolia | Synonym |  | RJP |  | 
	
		| Spiraea prunifolia var. pseudoprunifolia (Hayata ex Nakai) H.L.Li | Accepted |  | RJP |  | 
	
		| Spiraea prunifolia f. simpliciflora Nakai | Synonym |  | RJP |  | 
	
		| Spiraea prunifolia var. simpliciflora (Nakai) Nakai | Accepted |  | RJP |  | 
	
		| Spiraea pseudocrenata Nakai | Synonym |  | RJP |  | 
	
		| Spiraea pseudoprunifolia Hayata | Unresolved |  | RJP |  | 
	
		| Spiraea pseudoprunifolia Hayata ex Nakai | Synonym |  | RJP |  | 
	
		| Spiraea × pseudosalicifolia Silverside | Accepted |  | RJP |  | 
	
		| Spiraea pubescens Lindl. | Unresolved |  | RJP |  | 
	
		| Spiraea pubescens DC. | Synonym |  | RJP |  | 
	
		| Spiraea pubescens Cav. | Unresolved |  | RJP |  | 
	
		| Spiraea pubescens Turcz. | Accepted |  | RJP |  | 
	
		| Spiraea pubescens f. leiocarpa (Nakai) Kitag. | Accepted |  | RJP |  | 
	
		| Spiraea pubescens var. leiocarpa Nakai | Synonym |  | RJP |  | 
	
		| Spiraea pubescens var. pubescens | Synonym |  | RJP |  | 
	
		| Spiraea × pulchella Kunze | Accepted |  | RJP |  | 
	
		| Spiraea pulchra hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea pulverulenta Raf. | Synonym |  | RJP |  | 
	
		| Spiraea × pumila hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea × pumila var. bumalda hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea × pumila f. froebelii Zabel | Synonym |  | RJP |  | 
	
		| Spiraea × pumilionum Zabel | Accepted |  | RJP |  | 
	
		| Spiraea purpurea Hand.-Mazz. | Accepted |  | RJP |  | 
	
		| Spiraea × pyramidata Greene | Accepted |  | RJP |  | 
	
		| Spiraea quinqueloba (Baumg.) Spreng. | Synonym |  | RJP |  | 
	
		| Spiraea × racemosa R.I.Schr”d. | Unresolved |  | RJP |  | 
	
		| Spiraea raizadae Panigrahi & K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea reevesiana hort. | Unresolved |  | RJP |  | 
	
		| Spiraea reevesiana Lindl. | Synonym |  | RJP |  | 
	
		| Spiraea reevesiana var. florepleno E.Verdier | Synonym |  | RJP |  | 
	
		| Spiraea × reflexa hort. ex Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea regeliana S.Rinz ex Petz. & G.Kirchn. | Unresolved |  | RJP |  | 
	
		| Spiraea regeliana hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea repens Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea reticulata Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea × revirescens Zabel | Accepted |  | RJP |  | 
	
		| Spiraea rhamnifolia Wall. | Synonym |  | RJP |  | 
	
		| Spiraea rhamniphylla Panigrahi & K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea rhodoclada Leresche & Levier | Synonym |  | RJP |  | 
	
		| Spiraea rhombifolia hort. | Unresolved |  | RJP |  | 
	
		| Spiraea ribifolia Nutt. ex Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea ribisoidea Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea ribisoidea var. pubescens Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea rigoldi hort. | Unresolved |  | RJP |  | 
	
		| Spiraea robusta hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea robusta (Hook.f. & Thomson) Hand.Mazz. | Unresolved |  | RJP |  | 
	
		| Spiraea × rosalba Dippel | Accepted |  | RJP |  | 
	
		| Spiraea rosea (A.Gray) Koehne | Synonym |  | RJP |  | 
	
		| Spiraea rosea Raf. | Synonym |  | RJP |  | 
	
		| Spiraea roseata Rydb. | Unresolved |  | RJP |  | 
	
		| Spiraea rosthornii E.Pritz. | Accepted |  | RJP |  | 
	
		| Spiraea rotundata Koidz. | Unresolved |  | RJP |  | 
	
		| Spiraea rotundifolia hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea rotundifolia Lindl. | Synonym |  | RJP |  | 
	
		| Spiraea roxburghiana Wall. ex Voigt | Unresolved |  | RJP |  | 
	
		| Spiraea × rubella Dippel | Synonym |  | RJP |  | 
	
		| Spiraea ruberrima K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea × ruberrima Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea rubiacea Wall. | Synonym |  | RJP |  | 
	
		| Spiraea × rubra hort. ex Zabel | Accepted |  | RJP |  | 
	
		| Spiraea rubra (Hill) Britton | Synonym |  | RJP |  | 
	
		| Spiraea rupestris hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea rupestris hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea ruscifolia hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea salicifolia Elliott | Unresolved |  | RJP |  | 
	
		| Spiraea salicifolia auct. americ. | Unresolved |  | RJP |  | 
	
		| Spiraea salicifolia Schangin | Unresolved |  | RJP |  | 
	
		| Spiraea salicifolia L. | Accepted |  | RJP |  | 
	
		| Spiraea salicifolia var. carnea Aiton | Unresolved |  | RJP |  | 
	
		| Spiraea salicifolia f. grandiflora (G.Lodd.) C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea salicifolia var. grandiflora Loudon | Synonym |  | RJP |  | 
	
		| Spiraea salicifolia var. humilis (Pojark.) H.Hara | Synonym |  | RJP |  | 
	
		| Spiraea salicifolia var. lanceolata Torr. & A.Gray | Synonym |  | RJP |  | 
	
		| Spiraea salicifolia var. lanceolata Maxim. | Synonym |  | RJP |  | 
	
		| Spiraea salicifolia var. latifolia Sol. | Synonym |  | RJP |  | 
	
		| Spiraea salicifolia var. linearis Wenz. | Synonym |  | RJP |  | 
	
		| Spiraea salicifolia var. paniculata Aiton | Synonym |  | RJP |  | 
	
		| Spiraea salicifolia var. salicifolia | Synonym |  | RJP |  | 
	
		| Spiraea × sanssouciana K.Koch | Accepted |  | RJP |  | 
	
		| Spiraea sargentiana Rehder | Accepted |  | RJP |  | 
	
		| Spiraea savranica Besser ex Ser. | Unresolved |  | RJP |  | 
	
		| Spiraea sawranica Besser | Synonym |  | RJP |  | 
	
		| Spiraea saxatilis Turcz. ex Besser | Unresolved |  | RJP |  | 
	
		| Spiraea saxatilis Turcz. | Unresolved |  | RJP |  | 
	
		| Spiraea schinabecki Zabel | Unresolved |  | TRO |  | 
	
		| Spiraea × schinabeckii Zabel | Accepted |  | RJP |  | 
	
		| Spiraea schlothauerae Vorosch. & Ignatov | Unresolved |  | RJP |  | 
	
		| Spiraea schlothgauerae Ignatov & Vorosch. | Accepted |  | RJP |  | 
	
		| Spiraea schneideriana Rehder | Accepted |  | RJP |  | 
	
		| Spiraea schneideriana var. schneideriana | Synonym |  | RJP |  | 
	
		| Spiraea schochiana Rehder | Accepted |  | RJP |  | 
	
		| Spiraea schrenkiana Fisch. & C.A.Mey. | Unresolved |  | RJP |  | 
	
		| Spiraea scotica hort. | Unresolved |  | RJP |  | 
	
		| Spiraea × semperflorens hort. ex Zabel | Accepted |  | RJP |  | 
	
		| Spiraea semperflorens hort. ex Dieck | Synonym |  | RJP |  | 
	
		| Spiraea × semperflorens f. spicata Zabel | Synonym |  | RJP |  | 
	
		| Spiraea × semperflorens f. typica Zabel | Synonym |  | RJP |  | 
	
		| Spiraea septentrionalis (Fernald) Á.L”ve & D.L”ve | Accepted |  | RJP |  | 
	
		| Spiraea sericea Turcz. | Synonym |  | RJP |  | 
	
		| Spiraea serrata hort. | Synonym |  | RJP |  | 
	
		| Spiraea serratifolia hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea sheikii H.Zare | Unresolved |  | RJP |  | 
	
		| Spiraea sibirica hort. ex Zabel | Synonym |  | RJP |  | 
	
		| Spiraea sibirica hort. ex Steud. | Unresolved |  | RJP |  | 
	
		| Spiraea sibirica Raf. | Synonym |  | RJP |  | 
	
		| Spiraea siccanea (W.W.Sm.) Rehder | Accepted |  | RJP |  | 
	
		| Spiraea sikokualpina Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea sikokualpina var. glabra Koidz. | Synonym |  | RJP |  | 
	
		| Spiraea silvestris Nakai | Synonym |  | RJP |  | 
	
		| Spiraea simplex Greene | Unresolved |  | RJP |  | 
	
		| Spiraea simpliciflora (Nakai) Hatus. | Synonym |  | RJP |  | 
	
		| Spiraea simpliciflora (Nakai) Nakai | Unresolved |  | RJP |  | 
	
		| Spiraea sinensis hort. | Unresolved |  | RJP |  | 
	
		| Spiraea sinensis Lour. ex B.A.Gomes | Unresolved |  | RJP |  | 
	
		| Spiraea sinobrahuica W.W.Sm. | Synonym |  | RJP |  | 
	
		| Spiraea sinobrahuica var. aridicola W.W.Sm. | Synonym |  | RJP |  | 
	
		| Spiraea sorbifolia Hook.f. | Synonym |  | RJP |  | 
	
		| Spiraea sorbifolia Aitch. | Unresolved |  | RJP |  | 
	
		| Spiraea sorbifolia L. | Synonym |  | RJP |  | 
	
		| Spiraea sorbifolia var. alpina Ser. | Synonym |  | RJP |  | 
	
		| Spiraea sorbifolia var. alpina Pall. | Synonym |  | RJP |  | 
	
		| Spiraea sorbifolia var. alpina-pygmaea Pall. | Synonym |  | RJP |  | 
	
		| Spiraea sorbifolia var. angustifolia Wenz. | Unresolved |  | RJP |  | 
	
		| Spiraea sorbifolia var. lindleyana (Wall. ex Lindl.) K.Koch | Synonym |  | RJP |  | 
	
		| Spiraea sorbifolia var. pusilla Pall. | Synonym |  | RJP |  | 
	
		| Spiraea sororia Penny ex Loudon | Unresolved |  | RJP |  | 
	
		| Spiraea speciosa Dippel | Synonym |  | RJP |  | 
	
		| Spiraea speciosa Jungh. | Unresolved |  | RJP |  | 
	
		| Spiraea speciosa hort. ex K.Koch | Synonym |  | RJP |  | 
	
		| Spiraea × spicata Dippel | Synonym |  | RJP |  | 
	
		| Spiraea splendens hort. | Unresolved |  | RJP |  | 
	
		| Spiraea splendens Baumann ex K.Koch | Accepted |  | RJP |  | 
	
		| Spiraea splendens var. rosea (A.Gray) Kartesz & Gandhi | Accepted |  | RJP |  | 
	
		| Spiraea splendens var. splendens | Synonym |  | RJP |  | 
	
		| Spiraea standishii hort. | Synonym |  | RJP |  | 
	
		| Spiraea stellata Wall. | Synonym |  | RJP |  | 
	
		| Spiraea stellipila Maxim. | Unresolved |  | RJP |  | 
	
		| Spiraea stellipila Bean | Unresolved |  | RJP |  | 
	
		| Spiraea stevenii (C.K.Schneid.) Rydb. | Accepted |  | RJP |  | 
	
		| Spiraea stipulacea Pursh | Unresolved |  | RJP |  | 
	
		| Spiraea stipularis hort. ex Wenz. | Unresolved |  | RJP |  | 
	
		| Spiraea stipulata Muhl. ex Willd. | Unresolved |  | RJP |  | 
	
		| Spiraea × subcanescens Rydb. | Accepted |  | RJP |  | 
	
		| Spiraea subcanescens Rydb. | Unresolved |  | TRO |  | 
	
		| Spiraea subcordata Lenn‚ & K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea × subcordata Dippel | Synonym |  | RJP |  | 
	
		| Spiraea subdioica K.M.Purohit & Panigrahi | Unresolved |  | RJP |  | 
	
		| Spiraea sublobata Hand.-Mazz. | Accepted |  | RJP |  | 
	
		| Spiraea subrotundifolia Panigrahi & K.M.Purohit | Unresolved |  | RJP |  | 
	
		| Spiraea × subvillosa Rydb. | Unresolved |  | RJP |  | 
	
		| Spiraea subvillosa Rydb. | Accepted |  | TRO |  | 
	
		| Spiraea superba (Froebel ex Zabel) Zabel ex Dieck | Accepted |  | RJP |  | 
	
		| Spiraea × superba Froebel ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea syringaeflora hort. ex K.Koch | Unresolved |  | RJP |  | 
	
		| Spiraea × syringiflora Lemoine | Accepted |  | RJP |  | 
	
		| Spiraea tanguensis K.M.Purohit & Panigrahi | Unresolved |  | RJP |  | 
	
		| Spiraea tarokoensis Hayata | Accepted |  | RJP |  | 
	
		| Spiraea tatakaensis I.S.Chen | Unresolved |  | WCSP (in review) |  | 
	
		| Spiraea tatewakii Kitag. | Unresolved |  | RJP |  | 
	
		| Spiraea teniana Rehder | Accepted |  | RJP |  | 
	
		| Spiraea tenuifolia Otto ex Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea tenuissima CarriŠre | Unresolved |  | RJP |  | 
	
		| Spiraea tenuissima hort. ex Lavall‚e | Unresolved |  | RJP |  | 
	
		| Spiraea teretiuscula C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea thalictroides hort. ex Zabel | Unresolved |  | RJP |  | 
	
		| Spiraea thalictroides hort. | Unresolved |  | RJP |  | 
	
		| Spiraea thalictroides Pall. | Synonym |  | RJP |  | 
	
		| Spiraea thibetica Bureau & Franch. | Unresolved |  | RJP |  | 
	
		| Spiraea thompsonii hort. | Unresolved |  | RJP |  | 
	
		| Spiraea thunbergii Siebold ex Blume | Accepted |  | RJP |  | 
	
		| Spiraea thunbergii var. prunifolia (Siebold & Zucc.) Wenz. | Synonym |  | RJP |  | 
	
		| Spiraea thyrsiflora (D.Don) K.Koch | Synonym |  | RJP |  | 
	
		| Spiraea tianschanica Pojark. | Accepted |  | RJP |  | 
	
		| Spiraea tibetica T.T.Yu & L.T.Lu | Synonym |  | RJP |  | 
	
		| Spiraea tobolskia Loudon | Unresolved |  | RJP |  | 
	
		| Spiraea tomentosa L. | Accepted |  | RJP |  | 
	
		| Spiraea tomentosa f. alba (Weston) Rehder | Accepted |  | RJP |  | 
	
		| Spiraea tomentosa var. alba Weston | Synonym |  | RJP |  | 
	
		| Spiraea tomentosa var. albiflora Raf. | Synonym |  | RJP |  | 
	
		| Spiraea tomentosa var. ferruginea Raf. | Synonym |  | RJP |  | 
	
		| Spiraea tomentosa var. paniculata Raf. | Synonym |  | RJP |  | 
	
		| Spiraea tomentosa var. pumila Raf. | Synonym |  | RJP |  | 
	
		| Spiraea tomentosa var. tomentosa | Synonym |  | RJP |  | 
	
		| Spiraea tomentosa f. tomentosa | Synonym |  | TRO |  | 
	
		| Spiraea tomentosa var. virgata Raf. | Synonym |  | RJP |  | 
	
		| Spiraea tomentulosa (T.T.Yu) Y.Z.Zhao | Synonym |  | RJP |  | 
	
		| Spiraea tomentulosa Rydb. | Synonym |  | RJP |  | 
	
		| Spiraea tortuosa Rehder | Synonym |  | RJP |  | 
	
		| Spiraea tosaensis Yatabe | Synonym |  | RJP |  | 
	
		| Spiraea trichocarpa Nakai | Accepted |  | RJP |  | 
	
		| Spiraea trifoliata L. | Unresolved |  | RJP |  | 
	
		| Spiraea triloba Murray | Unresolved |  | RJP |  | 
	
		| Spiraea trilobata Nakai | Synonym |  | RJP |  | 
	
		| Spiraea trilobata auct. | Synonym |  | RJP |  | 
	
		| Spiraea trilobata L. | Accepted |  | RJP |  | 
	
		| Spiraea trilobata var. trilobata | Synonym |  | RJP |  | 
	
		| Spiraea × tristis Zabel | Accepted |  | RJP |  | 
	
		| Spiraea triternata Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea triumphans Zabel | Synonym |  | RJP |  | 
	
		| Spiraea tsusimensis Nakai | Synonym |  | RJP |  | 
	
		| Spiraea tuberosa Salisb. | Synonym |  | RJP |  | 
	
		| Spiraea ulicina Prain | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria L. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria Schultz | Unresolved |  | RJP |  | 
	
		| Spiraea ulmaria Strobl | Unresolved |  | RJP |  | 
	
		| Spiraea ulmaria var. concolor Neilr. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. denudata Hayne | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria subsp. denudata (J.Presl & C.Presl) Schübler & G.Martens | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. denudata (J.Presl & C.Presl) Cariot & St.-Lag. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. discolor W.D.J.Koch | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria subsp. discolor (W.D.J.Koch) Arcang. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. discolor Dumort. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. glaberrima (Beck) Rouy & E.G.Camus | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. glabrescens Rouy & E.G.Camus | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. glauca (Schultz) Wallr. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. incana Desv. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. nivea Wallr. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. tomentosa Gaudin | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. unicolor Rouy & E.G.Camus | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. viridis Wallr. | Synonym |  | RJP |  | 
	
		| Spiraea ulmaria var. viridis Desv. | Synonym |  | RJP |  | 
	
		| Spiraea ulmarioides Bory | Unresolved |  | RJP |  | 
	
		| Spiraea ulmifolia Scop. | Synonym |  | RJP |  | 
	
		| Spiraea ulmifolia var. pilosa Nakai | Synonym |  | RJP |  | 
	
		| Spiraea undulata Borkh. | Synonym |  | RJP |  | 
	
		| Spiraea unguiculata Dulac | Synonym |  | RJP |  | 
	
		| Spiraea uniflora (S.Watson) Piper | Unresolved |  | RJP |  | 
	
		| Spiraea uralensis Sweet | Synonym |  | RJP |  | 
	
		| Spiraea uratensis Franch. | Accepted |  | RJP |  | 
	
		| Spiraea ussuriensis Pojark. | Synonym |  | RJP |  | 
	
		| Spiraea vaccinifolia G.Lodd. | Synonym |  | RJP |  | 
	
		| Spiraea vaccinifolia hort. ex C.K.Schneid. | Synonym |  | RJP |  | 
	
		| Spiraea vaccinifolia hort. | Synonym |  | RJP |  | 
	
		| Spiraea vaccinifolia D.Don | Accepted |  | RJP |  | 
	
		| Spiraea vacciniifolia Lindl. [Spelling variant] | Synonym |  | RJP |  | 
	
		| Spiraea × vanhouttei (Briot) Zabel | Accepted |  | RJP |  | 
	
		| Spiraea × vanhouttei (Briot) CarriŠre | Unresolved |  | RJP |  | 
	
		| Spiraea veitchii Hemsl. | Accepted |  | RJP |  | 
	
		| Spiraea velutina Franch. | Accepted |  | RJP |  | 
	
		| Spiraea velutina C.K.Schneid. | Unresolved |  | RJP |  | 
	
		| Spiraea velutina var. velutina | Synonym |  | RJP |  | 
	
		| Spiraea venusta Dippel | Unresolved |  | RJP |  | 
	
		| Spiraea venusta hort. ex Otto & A.Dietr. | Unresolved |  | RJP |  | 
	
		| Spiraea venustula Kunth & Bouch‚ | Synonym |  | RJP |  | 
	
		| Spiraea versifolia Raf. | Unresolved |  | RJP |  | 
	
		| Spiraea vestita Wall. | Unresolved |  | RJP |  | 
	
		| Spiraea vestita Wall. ex G.Don | Synonym |  | RJP |  | 
	
		| Spiraea vestita f. depauperata Aitch. | Synonym |  | RJP |  | 
	
		| Spiraea villosicarpa K.M.Purohit & Panigrahi | Unresolved |  | RJP |  | 
	
		| Spiraea virgata Raf. | Synonym |  | RJP |  | 
	
		| Spiraea virgata Franch. | Synonym |  | RJP |  | 
	
		| Spiraea virgata var. hookeriana Raf. | Synonym |  | RJP |  | 
	
		| Spiraea virginiana Britton | Unresolved |  | RJP |  | 
	
		| Spiraea virginiana var. serrulata Rehder | Synonym |  | RJP |  | 
	
		| Spiraea vulgaris (Moench) Gray | Synonym |  | RJP |  | 
	
		| Spiraea wardii W.W.Sm. | Unresolved |  | RJP |  | 
	
		| Spiraea × watsoniana Zabel | Accepted |  | RJP |  | 
	
		| Spiraea wilsonii Duthie ex J.H.Veitch | Accepted |  | RJP |  | 
	
		| Spiraea xizangensis L.T.Lu | Accepted |  | RJP |  | 
	
		| Spiraea yatabei Nakai | Synonym |  | RJP |  | 
	
		| Spiraea yatabei var. latifolia Nakai | Synonym |  | RJP |  | 
	
		| Spiraea yazawai Makino | Synonym |  | RJP |  | 
	
		| Spiraea yunnanensis Franch. | Accepted |  | RJP |  | 
	
		| Spiraea yunnanensis var. siccanea W.W.Sm. | Synonym |  | RJP |  | 
	
		| Spiraea yunnanensis f. tortuosa (Rehder) Rehder | Synonym |  | RJP |  | 
	
		| Spiraea zabeliana C.K.Schneid. | Accepted |  | RJP |  | 
	
		| Spiraea zuccarinii Siebold ex Miq. | Unresolved |  | RJP |  |