| Sison acaule Sieber ex Steud. | Unresolved |  | WCSP (in review) | 
	
		| Sison aegopodioides Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison alpinus Sieber ex Schult. | Synonym |  | TRO | 
	
		| Sison ammi L. | Synonym |  | WCSP (in review) | 
	
		| Sison amomum L. | Unresolved |  | WCSP (in review) | 
	
		| Sison amomus St.-Lag. | Unresolved |  | WCSP (in review) | 
	
		| Sison anisum (L.) Spreng. | Synonym |  | TRO | 
	
		| Sison arvense Brot. | Unresolved |  | WCSP (in review) | 
	
		| Sison aureum Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison bulbosum Michx. | Synonym |  | TRO | 
	
		| Sison canadense L. | Synonym |  | TRO | 
	
		| Sison capense (Thunb.) Spreng. | Synonym |  | WCSP (in review) | 
	
		| Sison capillaceum Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison carvifolium Wall. | Unresolved |  | WCSP (in review) | 
	
		| Sison carvifolium Bertero ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison cernuum Salisb. | Unresolved |  | WCSP (in review) | 
	
		| Sison coniifolium Wall. ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison costatus (Elliott) Eaton | Unresolved |  | WCSP (in review) | 
	
		| Sison crinitum Pall. | Synonym |  | TRO | 
	
		| Sison divaricatum Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison diversifolium Wall. ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison erectum Salisb. | Unresolved |  | WCSP (in review) | 
	
		| Sison exaltatum Boiss. | Unresolved |  | WCSP (in review) | 
	
		| Sison fasciculatum Pohl ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison flexuosum Dumort. | Unresolved |  | WCSP (in review) | 
	
		| Sison flexuosum Ten. | Unresolved |  | WCSP (in review) | 
	
		| Sison gussoneanum Balb. ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison gussonei Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison haenkei C.Presl ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison heterophyllum Moench | Unresolved |  | WCSP (in review) | 
	
		| Sison integerrimum Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison inundatum L. | Unresolved |  | WCSP (in review) | 
	
		| Sison laciniatum L'Hér. ex DC. | Synonym |  | TRO | 
	
		| Sison lateriflorum Bertol. | Unresolved |  | WCSP (in review) | 
	
		| Sison majus Eaton & Wright | Unresolved |  | WCSP (in review) | 
	
		| Sison marginatum Michx. | Unresolved |  | WCSP (in review) | 
	
		| Sison nodiflorum Brot. | Unresolved |  | WCSP (in review) | 
	
		| Sison peregrinum Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison podagraria Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison proliferum Brocchi ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison pumilum Brot. | Synonym |  | WCSP (in review) | 
	
		| Sison pusillum Michx. | Unresolved |  | WCSP (in review) | 
	
		| Sison ranunculifolium C.Presl ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison rotundifolium Spreng. | Unresolved |  | WCSP (in review) | 
	
		| Sison rubricaule Eaton & Wright | Unresolved |  | WCSP (in review) | 
	
		| Sison ruta Burm.f. | Unresolved |  | WCSP (in review) | 
	
		| Sison salsum L.f. | Unresolved |  | WCSP (in review) | 
	
		| Sison segetum L. | Unresolved |  | WCSP (in review) | 
	
		| Sison sieberianum DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison sylvaticum Brot. | Unresolved |  | WCSP (in review) | 
	
		| Sison tenerum Wall. | Unresolved |  | WCSP (in review) | 
	
		| Sison thomasii Ten. | Unresolved |  | WCSP (in review) | 
	
		| Sison trifidum Burm. ex DC. | Unresolved |  | WCSP (in review) | 
	
		| Sison trifoliatum Michx. | Synonym |  | TRO | 
	
		| Sison trinervium Buch.-Ham. ex D.Don | Unresolved |  | WCSP (in review) | 
	
		| Sison verticillatoinundatum Thore | Unresolved |  | WCSP (in review) | 
	
		| Sison verticillatum Pall. | Unresolved |  | WCSP (in review) | 
	
		| Sison verticillatum L. | Unresolved |  | WCSP (in review) |