| Populus acuminata Rydb. | Accepted |  | TRO | 
	
		| Populus acuminata var. rehderi Sarg. | Synonym |  | TRO | 
	
		| Populus adenopoda Maxim. | Accepted |  | TRO | 
	
		| Populus adenopoda var. adenopoda | Accepted |  | TRO | 
	
		| Populus adenopoda f. cuneata Z. Wang & S. L. Tung | Synonym |  | TRO | 
	
		| Populus adenopoda f. microcarpa Z. Wang & S. L. Tung | Synonym |  | TRO | 
	
		| Populus afghanica (Aitch. & Hemsl.) C.K. Schneid. | Accepted |  | TRO | 
	
		| Populus afghanica var. afghanica | Accepted |  | TRO | 
	
		| Populus afghanica var. tajikistanica (Kom.) C. Wang & Chang Y. Yang | Accepted |  | TRO | 
	
		| Populus alaschanica Kom. | Accepted |  | TRO | 
	
		| Populus alba L. | Accepted |  | TRO | 
	
		| Populus alba var. bachofenii (Wierzb. ex Rochel) Wesm. | Accepted |  | TRO | 
	
		| Populus alba var. bolleana (Lauche) Otto | Synonym |  | TRO | 
	
		| Populus alba var. canescens Aiton | Synonym |  | TRO | 
	
		| Populus alba var. nivea Aiton | Synonym |  | TRO | 
	
		| Populus alba var. pyramidalis Bunge | Accepted |  | TRO | 
	
		| Populus alba f. pyramidalis Dipp. | Synonym |  | TRO | 
	
		| Populus amurensis Kom. | Accepted |  | TRO | 
	
		| Populus × andrewsii Sarg. | Unresolved |  | TRO | 
	
		| Populus angulata Aiton | Synonym |  | TRO | 
	
		| Populus angulata var. missouriensis A. Henry | Synonym |  | TRO | 
	
		| Populus angulosa Michx. | Unresolved |  | TRO | 
	
		| Populus angustifolia E. James | Accepted |  | TRO | 
	
		| Populus ariana Dode | Synonym |  | TRO | 
	
		| Populus arizonica Sarg. | Synonym |  | TRO | 
	
		| Populus arizonica var. jonesii Sarg. | Synonym |  | TRO | 
	
		| Populus aurea Tidestr. | Synonym |  | TRO | 
	
		| Populus bachofenii Wierzb. ex Rochel | Synonym |  | TRO | 
	
		| Populus baicalensis Kom. | Accepted |  | TRO | 
	
		| Populus balsamifera L. | Accepted |  | TRO | 
	
		| Populus balsamifera var. angustifolia (E. James) S. Watson | Synonym |  | TRO | 
	
		| Populus balsamifera var. californica S. Watson | Synonym |  | TRO | 
	
		| Populus balsamifera var. candicans (Aiton) A. Gray | Synonym |  | TRO | 
	
		| Populus balsamifera f. candicans (Aiton) B. Boivin | Accepted |  | TRO | 
	
		| Populus balsamifera var. lanceolata Marshall | Synonym |  | TRO | 
	
		| Populus balsamifera var. simonii (Carrière) Wesm. | Synonym |  | TRO | 
	
		| Populus balsamifera var. suaveolens Loudon | Synonym |  | TRO | 
	
		| Populus balsamifera var. subcordata Hyl. | Synonym |  | TRO | 
	
		| Populus balsamifera subsp. trichocarpa (Torr. & A. Gray) Brayshaw | Synonym |  | TRO | 
	
		| Populus × barnesii W.H. Wagner | Unresolved |  | TRO | 
	
		| Populus beijingensis W.Y. Hsu | Accepted |  | TRO | 
	
		| Populus × beijingensis W.Y. Hsu | Unresolved |  | TRO | 
	
		| Populus berkarensis Poljakov | Unresolved |  | TRO | 
	
		| Populus × bernardii B. Boivin | Unresolved |  | TRO | 
	
		| Populus × berolinensis Dippel | Accepted |  | TRO | 
	
		| Populus besseyana Dode | Unresolved |  | TRO | 
	
		| Populus bolleana Lauche | Synonym |  | TRO | 
	
		| Populus bonatii H. Lév. | Synonym |  | TRO | 
	
		| Populus brandegeei C.K. Schneid. | Unresolved |  | TRO | 
	
		| Populus × brayshawii B. Boivin | Unresolved |  | TRO | 
	
		| Populus cana T.Y. Sun | Unresolved |  | TRO | 
	
		| Populus × canadensis Moench | Accepted |  | TRO | 
	
		| Populus canadensis var. angustifolia (E. James) Wesm. | Synonym |  | TRO | 
	
		| Populus canadensis var. fremontii (S. Watson) Kuntze | Synonym |  | TRO | 
	
		| Populus candicans Aiton | Accepted |  | TRO | 
	
		| Populus canescens (Aiton) Sm. | Accepted |  | TRO | 
	
		| Populus caspica Bornm. | Unresolved |  | TRO | 
	
		| Populus cataracti Kom. | Unresolved |  | TRO | 
	
		| Populus cathayana Rehder | Synonym |  | TRO | 
	
		| Populus cathayana f. latifolia C. Wang & C.Y. Yu | Synonym |  | TRO | 
	
		| Populus cathayana var. latifolia (C. Wang & C.Y. Yu) C. Wang & S.L. Tung | Unresolved |  | TRO | 
	
		| Populus cathayana var. schneideri Rehder | Synonym |  | TRO | 
	
		| Populus celtidifolia T.B. Chao | Unresolved |  | TRO | 
	
		| Populus cercidiphylla Britton | Unresolved |  | TRO | 
	
		| Populus charbinensis C. Wang & Skvortsov | Accepted |  | TRO | 
	
		| Populus ciliata Wall. ex Royle | Accepted |  | TRO | 
	
		| Populus ciliata var. weixii C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus ciupi S.Y. Wang | Unresolved |  | TRO | 
	
		| Populus coloradensis Dode | Synonym |  | TRO | 
	
		| Populus davidiana Dode | Accepted |  | TRO | 
	
		| Populus davidiana var. davidiana | Accepted |  | TRO | 
	
		| Populus davidiana f. ovata Z. Wang & S. L. Tung | Synonym |  | TRO | 
	
		| Populus davidiana f. pendula (Skvortsov) C. Wang & Tung | Synonym |  | TRO | 
	
		| Populus davidiana var. pendula Skvortsov | Synonym |  | TRO | 
	
		| Populus davidiana var. tomentella (C.K. Schneid.) Nakai | Accepted |  | TRO | 
	
		| Populus davidiana var. tomentosa (C.K. Schneid.) Nakai | Accepted |  | TRO | 
	
		| Populus deltoides W. Bartram ex Marshall | Accepted |  | TRO | 
	
		| Populus deltoides var. deltoides | Accepted |  | TRO | 
	
		| Populus deltoides subsp. deltoides | Unresolved |  | TRO | 
	
		| Populus deltoides var. fremontii (S. Watson) Cronquist | Accepted |  | TRO | 
	
		| Populus deltoides var. mesetae (Eckenw.) Cronquist | Accepted |  | TRO | 
	
		| Populus deltoides subsp. monilifera (Aiton) Eckenw. | Synonym |  | TRO | 
	
		| Populus deltoides var. monilifera (Aiton) A. Henry | Synonym |  | TRO | 
	
		| Populus deltoides var. occidentalis Rydb. | Accepted |  | TRO | 
	
		| Populus deltoides subsp. wislizeni (S. Watson) Eckenw. | Synonym |  | TRO | 
	
		| Populus deltoides var. wislizeni (S. Watson) Dorn | Accepted |  | TRO | 
	
		| Populus deltoides x nigra | Synonym |  | TRO | 
	
		| Populus densa Kom. | Synonym |  | TRO | 
	
		| Populus dimorpha Brandegee | Accepted |  | TRO | 
	
		| Populus diversifolia Schrenk | Synonym |  | TRO | 
	
		| Populus duclouxiana Dode | Synonym |  | TRO | 
	
		| Populus euphratica Olivier | Accepted |  | TRO | 
	
		| Populus euphratica f. pruinosa Nevski | Synonym |  | TRO | 
	
		| Populus euramericana Guinier | Synonym |  | TRO | 
	
		| Populus fangiana N. Chao & J.K. Liu | Unresolved |  | TRO | 
	
		| Populus fangiana var. microphylla (C. Wang & S.L. Tung) N. Chao & J.K. Liu | Synonym |  | TRO | 
	
		| Populus fargesii Franch. | Unresolved |  | TRO | 
	
		| Populus fastigiata Poir. | Synonym |  | TRO | 
	
		| Populus flexibilis Roz. | Accepted |  | TRO | 
	
		| Populus fortissima A. Nelson & J.F. Macbr. | Synonym |  | TRO | 
	
		| Populus fremontii S. Watson | Accepted |  | TRO | 
	
		| Populus fremontii var. mesetae (Eckenw.) Little | Synonym |  | TRO | 
	
		| Populus fremontii var. pubescens Sarg. | Synonym |  | TRO | 
	
		| Populus fremontii var. wislizeni S. Watson | Synonym |  | TRO | 
	
		| Populus fremontii subsp. wislizeni (S. Watson) A.E. Murray | Synonym |  | TRO | 
	
		| Populus funiushanensis T.B. Chao | Unresolved |  | TRO | 
	
		| Populus gamblei Dode | Unresolved |  | TRO | 
	
		| Populus gamblei var. qiongdaoensis (T. Hong & P. Luo) N. Chao & J.K. Liu | Synonym |  | TRO | 
	
		| Populus gansuensis C. Wang & H.L. Yang | Accepted |  | TRO | 
	
		| Populus × gansuensis C. Wang & H.L. Yang | Unresolved |  | TRO | 
	
		| Populus gileadensis Rouleau | Unresolved |  | TRO | 
	
		| Populus girinensis Skvortsov | Accepted |  | TRO | 
	
		| Populus glabrata Dode | Synonym |  | TRO | 
	
		| Populus glauca Haines | Accepted |  | TRO | 
	
		| Populus × glaucicomans Dode | Accepted |  | TRO | 
	
		| Populus gonggaensis N. Chao & J.R. He | Unresolved |  | TRO | 
	
		| Populus gracilis Grossh. | Unresolved |  | TRO | 
	
		| Populus grandidentata Michx. | Synonym |  | TRO | 
	
		| Populus guzmanantlensis J.A. Vazquez G. & Cuevas | Accepted |  | TRO | 
	
		| Populus haoana Cheng & Z. Wang in Z. Wang & S. L. Tung | Accepted |  | TRO | 
	
		| Populus hastata Dode | Synonym |  | TRO | 
	
		| Populus × heimburgeri B. Boivin | Unresolved |  | TRO | 
	
		| Populus heterophylla L. | Unresolved |  | TRO | 
	
		| Populus hinckleyana Correll | Synonym |  | TRO | 
	
		| Populus honanensis T.B. Chao & C.W. Chiuan | Unresolved |  | TRO | 
	
		| Populus × hopeiensis Hu & Chow | Accepted |  | TRO | 
	
		| Populus hsinganica C. Wang & Skvortsov | Accepted |  | TRO | 
	
		| Populus hybrida M. Bieb. | Unresolved |  | TRO | 
	
		| Populus hybrida var. berolinensis C. Koch | Synonym |  | TRO | 
	
		| Populus hyrcana Grossh. | Unresolved |  | TRO | 
	
		| Populus ilicifolia (Engl.) Rouleau | Accepted |  | TRO | 
	
		| Populus iliensis Drobow | Accepted |  | TRO | 
	
		| Populus × inopina Eckenw. | Unresolved |  | TRO | 
	
		| Populus × intercurrens Goodrich & S.L. Welsh | Synonym |  | TRO | 
	
		| Populus intramongolica T.Y. Sun & E.W. Ma | Accepted |  | TRO | 
	
		| Populus italica Moench | Synonym |  | TRO | 
	
		| Populus × jackii Sarg. | Unresolved |  | TRO | 
	
		| Populus jezoensis Nakai | Unresolved |  | TRO | 
	
		| Populus × jrtyschensis Cheng-yuan Yang | Accepted |  | TRO | 
	
		| Populus kangdingensis C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus kangdingensis var. lancifolia (N. Chao) N. Chao & J.K. Liu | Synonym |  | TRO | 
	
		| Populus kangdingensis var. schneideri (Rehder) N. Chao & J.K. Liu | Synonym |  | TRO | 
	
		| Populus kangdingensis var. tibetica (C.K. Schneid.) N. Chao & J.K. Liu | Synonym |  | TRO | 
	
		| Populus kanjilaliana Dode | Unresolved |  | TRO | 
	
		| Populus kanjilaliana subsp. usbekistanica Poljakov | Synonym |  | TRO | 
	
		| Populus × kashmirica A.K.Skvortsov | Unresolved |  | WCSP (in review) | 
	
		| Populus keerqinensis T.Y. Sun | Accepted |  | TRO | 
	
		| Populus komarovii Ja. Vassil. ex Worosch. | Unresolved |  | TRO | 
	
		| Populus koreana Rehder | Accepted |  | TRO | 
	
		| Populus × krauseana Dode. | Unresolved |  | TRO | 
	
		| Populus lancifolia N. Chao | Accepted |  | TRO | 
	
		| Populus lasiocarpa Oliv. | Accepted |  | TRO | 
	
		| Populus laurifolia Ledeb. | Accepted |  | TRO | 
	
		| Populus laurifolia var. simonii (Carrière) Regel | Synonym |  | TRO | 
	
		| Populus liaotungensis C. Wang & Skvortsov | Synonym |  | TRO | 
	
		| Populus litwinowiana Dode | Synonym |  | TRO | 
	
		| Populus longifolia Fisch. | Unresolved |  | TRO | 
	
		| Populus macdougallii Rose | Synonym |  | TRO | 
	
		| Populus macranthela H. Lév. & Vaniot | Synonym |  | TRO | 
	
		| Populus macrocarpa Pavl. & Lipsch. | Synonym |  | TRO | 
	
		| Populus mainlingensis C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus major Mill. | Synonym |  | TRO | 
	
		| Populus manshurica Nakai | Accepted |  | TRO | 
	
		| Populus marilandica Bosc. ex Poiret | Unresolved |  | TRO | 
	
		| Populus maximowiczii A. Henry | Accepted |  | TRO | 
	
		| Populus maximowiczii var. barbinervis Nakai | Synonym |  | TRO | 
	
		| Populus mexicana Wesm. ex DC. | Accepted |  | TRO | 
	
		| Populus michauxii Dode | Synonym |  | TRO | 
	
		| Populus minhoensis S.F. Yang & H.F. Wu | Accepted |  | TRO | 
	
		| Populus monilifera Aiton | Synonym |  | TRO | 
	
		| Populus monilifera var. occidentalis (Rydb.) A. Henry | Synonym |  | TRO | 
	
		| Populus monticola Brandegee | Unresolved |  | TRO | 
	
		| Populus × moskoviensis Schroed. | Unresolved |  | TRO | 
	
		| Populus nakaii Skvortsov | Accepted |  | TRO | 
	
		| Populus nigra L. | Accepted |  | TRO | 
	
		| Populus nigra var. afghanica Aitch. & Hemsl. | Synonym |  | TRO | 
	
		| Populus nigra subsp. flexibilis Kamelin | Synonym |  | TRO | 
	
		| Populus nigra var. italica Koehne | Accepted |  | TRO | 
	
		| Populus nigra subsp. pyramidalis Čelak. | Synonym |  | TRO | 
	
		| Populus nigra var. pyramidalis Spach | Synonym |  | TRO | 
	
		| Populus nigra var. thevestina (Dode) Bean | Accepted |  | TRO | 
	
		| Populus ningshanica C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus nivea Willd. | Accepted |  | TRO | 
	
		| Populus occidentalis (Rydb.) Britton ex Rydb. | Synonym |  | TRO | 
	
		| Populus palmeri Sarg. | Unresolved |  | TRO | 
	
		| Populus pamirica Kom. | Accepted |  | TRO | 
	
		| Populus × parryi Sarg. | Unresolved |  | TRO | 
	
		| Populus pekinensis Henry | Synonym |  | TRO | 
	
		| Populus pilosa Rehder | Accepted |  | TRO | 
	
		| Populus platyphylla T.Y. Sun | Accepted |  | TRO | 
	
		| Populus platyphylla var. flaviflora T.Y. Sun | Synonym |  | TRO | 
	
		| Populus platyphylla var. glauca T.Y. Sun | Synonym |  | TRO | 
	
		| Populus × polygonifolia F.G. Bernard | Unresolved |  | TRO | 
	
		| Populus pruinosa Schrenk | Accepted |  | TRO | 
	
		| Populus przewalskii Maxim. | Accepted |  | TRO | 
	
		| Populus przewalskii f. microphylla Gomb. | Synonym |  | TRO | 
	
		| Populus pseudobalsamifera Fisch. | Unresolved |  | TRO | 
	
		| Populus pseudoglauca C. Wang & P.Y. Fu | Accepted |  | TRO | 
	
		| Populus pseudoglauca var. weixi (C. Wang & S.L. Tung) N. Chao & J.K. Liu | Synonym |  | TRO | 
	
		| Populus pseudoglauca var. yatungensis (Z. Wang & P.Y. Fu) N. Chao | Synonym |  | TRO | 
	
		| Populus pseudomaximowiczii C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus pseudomaximowiczii f. glabrata Z. Wang & S. L. Tung | Synonym |  | TRO | 
	
		| Populus pseudonivea Grossh. | Synonym |  | TRO | 
	
		| Populus pseudosimonii Kitag. | Accepted |  | TRO | 
	
		| Populus × pseudotomentosa C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus pseudotremula N.I. Rubtzov | Synonym |  | TRO | 
	
		| Populus purdomii Rehder | Accepted |  | TRO | 
	
		| Populus purdomii var. rockii (Rehder) C.F. Fang & H.L. Yang | Accepted |  | TRO | 
	
		| Populus pyramidalis Rozier | Synonym |  | TRO | 
	
		| Populus qamdoensis C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus qiongdaoensis T. Hong & P. Luo | Accepted |  | TRO | 
	
		| Populus × rasumowskiana Schneid. | Accepted |  | TRO | 
	
		| Populus regenerata Henry ex Schneid. | Unresolved |  | TRO | 
	
		| Populus robusta C.K. Schneid. | Unresolved |  | TRO | 
	
		| Populus rockii (Rehder) H.L.Yang | Unresolved |  | WCSP (in review) | 
	
		| Populus rotundifolia Griff. | Accepted |  | TRO | 
	
		| Populus rotundifolia var. bonatii (H. Lév.) C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus rotundifolia var. duclouxiana (Dode) Gombócz | Accepted |  | TRO | 
	
		| Populus rotundifolia var. macranthela (H. Lév. & Vaniot) Gomb. | Accepted |  | TRO | 
	
		| Populus × rouleauana B. Boivin | Unresolved |  | TRO | 
	
		| Populus sargentii Dode | Synonym |  | TRO | 
	
		| Populus schischkinii Grossh. | Unresolved |  | TRO | 
	
		| Populus schneideri (Rehder) N. Chao | Accepted |  | TRO | 
	
		| Populus schneideri var. tibetica (C.K. Schneid.) N. Chao | Synonym |  | TRO | 
	
		| Populus × sennii B. Boivin | Unresolved |  | TRO | 
	
		| Populus serotina Hartig | Unresolved |  | TRO | 
	
		| Populus shanxiensis C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus × sibirica G.V.Krylov & G.V.Grig. ex A.K.Skvortsov | Unresolved |  | WCSP (in review) | 
	
		| Populus sieboldii Miq. | Unresolved |  | TRO | 
	
		| Populus silvestrii Pamp. | Synonym |  | TRO | 
	
		| Populus simaroa Rzed. | Accepted |  | TRO | 
	
		| Populus simonii Carrière | Accepted |  | TRO | 
	
		| Populus simonii var. breviamenta T.Y. Sun | Synonym |  | TRO | 
	
		| Populus simonii f. fastigiata C.K. Schneid. | Synonym |  | TRO | 
	
		| Populus simonii var. griseoalba T.Y. Sun | Synonym |  | TRO | 
	
		| Populus simonii f. liaotungensis (C. Wang & Skvortsov) Kitag. | Synonym |  | TRO | 
	
		| Populus simonii var. liaotungensis (C. Wang & Skvortsov) C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus simonii var. manshurica (Nakai) Kitag. | Synonym |  | TRO | 
	
		| Populus simonii var. ovata T.Y. Sun | Synonym |  | TRO | 
	
		| Populus simonii f. pendula C.K. Schneid. | Synonym |  | TRO | 
	
		| Populus simonii f. przewalskii (Maxim.) Rehder | Synonym |  | TRO | 
	
		| Populus simonii var. przewalskii (Maxim.) H.L. Yang | Synonym |  | TRO | 
	
		| Populus simonii f. rhombifolia (Kitag.) C. Wang & Tung | Accepted |  | TRO | 
	
		| Populus simonii var. rhombifolia Kitag. | Synonym |  | TRO | 
	
		| Populus simonii f. robusta Z. Wang & S. L. Tung | Synonym |  | TRO | 
	
		| Populus simonii var. simonii | Accepted |  | TRO | 
	
		| Populus sinxiangensis T.B. Chao | Unresolved |  | TRO | 
	
		| Populus × smithii B. Boivin | Unresolved |  | TRO | 
	
		| Populus sosnowskyi Grossh. | Synonym |  | TRO | 
	
		| Populus suaveolens Fisch. | Accepted |  | TRO | 
	
		| Populus suaveolens subsp. baicalensis Egor. & Sipl. | Synonym |  | TRO | 
	
		| Populus suaveolens var. macrocarpa SCHRENK | Synonym |  | TRO | 
	
		| Populus suaveolens var. przewalskii (Maxim.) C.K. Schneid. | Synonym |  | TRO | 
	
		| Populus sunghoensis T.B. Chao & C.W. Chiuan | Unresolved |  | TRO | 
	
		| Populus szechuanica C.K. Schneid. | Accepted |  | TRO | 
	
		| Populus szechuanica var. rockii Rehder | Synonym |  | TRO | 
	
		| Populus szechuanica var. tibetica C.K. Schneid. | Accepted |  | TRO | 
	
		| Populus tacamahacca Mill. | Unresolved |  | TRO | 
	
		| Populus tacamahacca var. candicans (Aiton) Stout | Synonym |  | TRO | 
	
		| Populus tacamahacca var. lanceolata (Marshall) Farw. | Unresolved |  | TRO | 
	
		| Populus tacamahacca var. michauxii (Dode) Farw. | Unresolved |  | TRO | 
	
		| Populus tajikistanica Kom. | Synonym |  | TRO | 
	
		| Populus talassica Kom. | Accepted |  | TRO | 
	
		| Populus texana Sarg. | Synonym |  | TRO | 
	
		| Populus thevestina Dode | Synonym |  | TRO | 
	
		| Populus tianschanica Tkatsch. | Unresolved |  | TRO | 
	
		| Populus tomentosa C.K. Schneid. | Synonym |  | TRO | 
	
		| Populus tomentosa Carrière | Accepted |  | TRO | 
	
		| Populus tomentosa var. tomentosa | Accepted |  | TRO | 
	
		| Populus transcaucasica Jarm. ex Grossh. | Synonym |  | TRO | 
	
		| Populus tremula L. | Accepted |  | TRO | 
	
		| Populus tremula var. adenopoda (Maxim.) Burkill | Synonym |  | TRO | 
	
		| Populus tremula subsp. davidiana (Dode) Hultén | Synonym |  | TRO | 
	
		| Populus tremula var. davidiana (Dode) C.K. Schneid. | Synonym |  | TRO | 
	
		| Populus tremula subsp. grandidentata (Michx.) Á. Löve & D. Löve | Accepted |  | TRO | 
	
		| Populus tremula f. tomentella C.K. Schneid. | Synonym |  | TRO | 
	
		| Populus tremula subsp. tremuloides (Michx.) Á. Löve & D. Löve | Synonym |  | TRO | 
	
		| Populus tremuloides Michx. | Accepted |  | TRO | 
	
		| Populus tremuloides var. aurea (Tidestr.) Daniels | Synonym |  | TRO | 
	
		| Populus trichocarpa Torr. & A. Gray | Accepted |  | TRO | 
	
		| Populus trichocarpa var. cupulata S. Watson | Synonym |  | TRO | 
	
		| Populus trichocarpa var. hastata (Dode) A. Henry | Synonym |  | TRO | 
	
		| Populus trichocarpa subsp. hastata (Dode) Dode | Synonym |  | TRO | 
	
		| Populus trichocarpa var. ingrata (Jeps.) Parish | Accepted |  | TRO | 
	
		| Populus trichocarpa f. ingrata Jeps. | Synonym |  | TRO | 
	
		| Populus trinervis C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus tristis Fisch. | Unresolved |  | TRO | 
	
		| Populus trunculoides | Unresolved |  | TRO | 
	
		| Populus tweedyi Britton | Unresolved |  | TRO | 
	
		| Populus usbekistanica Kom. | Synonym |  | TRO | 
	
		| Populus usbekistanica subsp. tajikistanica (Kom.) Bugala | Synonym |  | TRO | 
	
		| Populus ussuriensis Kom. | Accepted |  | TRO | 
	
		| Populus villosa Lang | Unresolved |  | TRO | 
	
		| Populus violascens Dode | Accepted |  | TRO | 
	
		| Populus virginiana Foug. | Synonym |  | TRO | 
	
		| Populus wenxianica Z.C. Feng & J.L. Guo ex G.H. Zhu | Accepted |  | TRO | 
	
		| Populus × wettsteinii Hämet-Ahti | Unresolved |  | TRO | 
	
		| Populus wilsonii C.K. Schneid. | Accepted |  | TRO | 
	
		| Populus wilsonii f. brevipetiolata C. Wang & S.L. Tung | Synonym |  | TRO | 
	
		| Populus wilsonii f. pedicellata Z. Wang & S. L. Tung | Synonym |  | TRO | 
	
		| Populus wislizeni (S. Watson) Sarg. | Synonym |  | TRO | 
	
		| Populus wuana C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus wulianensis S.B. Liang & X.W. Li | Accepted |  | TRO | 
	
		| Populus wutanica Mayr | Synonym |  | TRO | 
	
		| Populus xiangchengensis Z. Wang & S. L. Tung | Accepted |  | TRO | 
	
		| Populus × xiaohei T.S. Hwang & Liang | Accepted |  | TRO | 
	
		| Populus × xiaozhuanica W.Y. Hsu & Liang | Accepted |  | TRO | 
	
		| Populus yatungensis (Z. Wang & P.Y. Fu) C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus yatungensis var. pedicellata (C. Wang & S.L. Tung) P. I Mao | Synonym |  | TRO | 
	
		| Populus yatungensis var. trichorachis C. Wang & S.L. Tung | Synonym |  | TRO | 
	
		| Populus yuana C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus yunnanensis Dode | Accepted |  | TRO | 
	
		| Populus yunnanensis var. microphylla C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus yunnanensis var. pedicellata C. Wang & S.L. Tung | Accepted |  | TRO | 
	
		| Populus yunnanensis var. yatungensis Z. Wang & P.Y. Fu | Synonym |  | TRO | 
	
		| Populus yunsiaomanshanensis T.B. Chao & C.W. Chiuan | Unresolved |  | TRO | 
	
		| Populus yunsiaoshanensis T.B. Chao & C.W. Chiuan | Unresolved |  | TRO | 
	
		| Populus yunungii G.L. Lu | Unresolved |  | TRO |