| Rheum acuminatum Hook. f. & Thomson | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum alexandrae Batalin | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum altaicum Losinsk. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum aplostachyum Kar. & Kir. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum australe D. Don | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum austriacum Horkel ex G.Don | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum baillonii F.Heim | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum cantoniense Lour. ex Gomes Mach. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum caspicum Pall. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum collinianum Baill. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum compactum L. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum cordatum Losinsk. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum cordatum Steud. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum coreanum Nakai | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum crassinervium Fisch. ex Lindl. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum crispum G.Don | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum cruentum Siev. ex Pall. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum × cultorum Thorsrud & Reisaeter | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum cuneatum Regel & Herder | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum darvasicum V.S.Titov ex Losinsk. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum darwasicum Titov ex Losinsk. | 
		Unresolved | 
		  | 
		TRO | 
	
	
		| Rheum delavayi Franch. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum dentatum Mart. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum digynum (L.) Wahlenb. | 
		Synonym | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum emodii Wall. ex Meisn. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum esculentum Salisb. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum fedtschenkoi Maxim. ex Regel | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum fenestratum Loudon | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum ferganense Titov | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum forrestii Diels | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum franzenbachii Münter | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum franzenbachii var. mongolicum Münter | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum glabricaule Sam. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum globulosum Gage | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum hirsutifolium Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum hirsutum Maxim. ex Franch. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum hissaricum Losinsk. | 
		Unresolved | 
		  | 
		TRO | 
	
	
		| Rheum hotaoense C.Y. Cheng & T.C. Kao | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum × hybridum Murray | 
		Accepted | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum inopinatum Prain | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum kialense Franch. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum korshinskyi Titov ex Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum laciniatum Prain | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum leucorrhizum Pall. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum lhasaense A.J. Li & P.G. Xiao | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum likiangense Sam. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum lobatum Litv. ex Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum lucidum Losinsk. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum macrocarpum Losinsk. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum macropterum Mart. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum maculatum C.Y. Cheng & T.C. Kao | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum maximowiczii Losinsk. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum megalocarpon Maxim. ex B.Fedtsch. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum megalophyllum SUMNER | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum micranthum Sam. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum moorcroftianum Royle | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum muricatum Blanco | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum nanum Siev. ex Pall. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum nanum Lingelsh. ex Limpr. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum nepalense Kitam. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum nobile Hook. f. & Thomson | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum nuratavicum Titov | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum nutans Pall. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum officinale Baill. | 
		Accepted | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum orientale Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum orientalixizangense Y.K. Yang, J.K. Wu & Gasang. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum orientixizangense Y.K.Yang, J.K.Wu & Gasang. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum ovatum C.Y. Cheng & T.C. Kao | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum palaestinum Feinbrun | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum palmatum L. | 
		Accepted | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum palmatum subsp. dissectum Stapf | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum palmatum f. rubiflora Stapf | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum palmatum var. tanguticum Maxim. ex Regel | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum persicum Losinsk. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum pichonii Pierre ex F.B.Forbes & Hemsl. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum pichonii Pierre ex A.Chev. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum platylobum Rech.f. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum plicatum Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum potaninii Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum przewalskyi Losinsk. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum pumilum Maxim. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum qinlingense Y.K. Yang, J.K. Wu & D.K. Zhang | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum racemiferum Maxim. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum renifolium SUMNER | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum reticulatum Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum rhabarbarum L. | 
		Accepted | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum rhaponticum L. | 
		Accepted | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum rhaponticum Herder | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum rhizostachyum Schrenk | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum rhomboideum Losinsk. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum ribes L. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum rotundatum Stokes | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum rotundifolium Fisch. ex Sweet | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum rugosum Desf. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum rupestre Litv. ex Losinsk. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum sanguineum Meisn. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum scaberrimum Lingelsh. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum sibiricum Pall. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum songaricum Schrenk | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum spiciforme Royle | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum strictum Franch. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum subacaule Sam. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum sublanceolatum C.Y. Cheng & T.C. Kao | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum × svetlanae Krassovsk. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum tanguticum Maxim. ex Balf. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum tanguticum var. tanguticum  | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum tanguticum var. viridiflorum Y.K. Yang & D.K. Zhang | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum tataricum L.f. | 
		Accepted | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum tetragonopus Mart. | 
		Unresolved | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum tibeticum Maxim. ex Hook. f. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum turanicum Litv. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum turkestanicum Janisch. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum undulalum L. | 
		Synonym | 
		  | 
		WCSP (in review) | 
	
	
		| Rheum undulatum L. | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum undulatum var. longifolium C.Y. Cheng & T.C. Kao | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum uninerve Maxim. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum vvedenskyi SUMNER | 
		Synonym | 
		  | 
		TRO | 
	
	
		| Rheum webbianum Royle | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum wittrockii C.E. Lundstr. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum yunnanense Sam. | 
		Accepted | 
		  | 
		TRO | 
	
	
		| Rheum zergericum Titov | 
		Synonym | 
		  | 
		TRO |