| Sphaerostigma acuminatum Phil. | Synonym |  | TRO | 
	
		| Sphaerostigma alyssoides (Hook. & Arn.) Walp. | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma alyssoides var. macrophyllum Small | Synonym |  | TRO | 
	
		| Sphaerostigma alyssoides var. minutiflorum (S. Watson) Small | Synonym |  | TRO | 
	
		| Sphaerostigma andinum (Nutt.) Walp. | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma andinum var. hilgardii (Greene) A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma angelorum (S. Watson) A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma arenicolum A.Nelson | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma bistortum (Nutt. ex Torr. & A. Gray) Walp. | Synonym |  | TRO | 
	
		| Sphaerostigma bistortum var. reedii Parish | Synonym |  | TRO | 
	
		| Sphaerostigma bistortum var. veitchianum (Hook.) A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma boothii (Douglas) Walp. | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma boothii var. pygmaeum (Douglas) Walp. | Synonym |  | TRO | 
	
		| Sphaerostigma campestre (Greene) Small | Synonym |  | TRO | 
	
		| Sphaerostigma campestre var. mixtum (H. Lév.) A. Nelson | Unresolved |  | TRO | 
	
		| Sphaerostigma campestre var. parishii Abrams | Synonym |  | TRO | 
	
		| Sphaerostigma chamaenerioides (A.Gray) Small | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma chamissonis Fisch. & C.A.Mey. | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma cheiranthifolium (Hornem. ex Spreng.) Fisch. & C.A. Mey. | Synonym |  | TRO | 
	
		| Sphaerostigma contortum (Douglas ex Hook.) Walp. | Synonym |  | TRO | 
	
		| Sphaerostigma contortum var. flexuosum A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma contortum var. pubens (S. Watson) Small | Synonym |  | TRO | 
	
		| Sphaerostigma decorticans (Hook. & Arn.) Small | Synonym |  | TRO | 
	
		| Sphaerostigma dentata (Cav.) Walp. | Accepted |  | TRO | 
	
		| Sphaerostigma dentata subsp. campestris (Greene) Johans. | Synonym |  | TRO | 
	
		| Sphaerostigma deserti (M.E. Jones) A. Heller | Accepted |  | TRO | 
	
		| Sphaerostigma divaricatum Gay | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma epilobioides Walp. | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma erythrum Davidson | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma filiforme A.Nelson | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma flexuosum (A. Nelson) Rydb. | Synonym |  | TRO | 
	
		| Sphaerostigma gauriflorum (Torr. & A. Gray) Walp. | Accepted |  | TRO | 
	
		| Sphaerostigma hallii Davidson | Synonym |  | TRO | 
	
		| Sphaerostigma heterophyllum Gay | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma hilgardii (Greene) Small | Synonym |  | TRO | 
	
		| Sphaerostigma hirtellum (Greene) Small | Synonym |  | TRO | 
	
		| Sphaerostigma hirtum (Link) Fisch. & C.A. Mey. | Accepted |  | TRO | 
	
		| Sphaerostigma hitchcockii (H. Lév.) A. Nelson | Accepted |  | TRO | 
	
		| Sphaerostigma implexum A.Nelson | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma lemmonii A.Nelson | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma macrophyllum (Small) Rydb. | Accepted |  | TRO | 
	
		| Sphaerostigma micranthum (Hornem. ex Spreng.) Walp. | Synonym |  | TRO | 
	
		| Sphaerostigma micranthum var. exfoliatum A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma micranthum var. jonesii (H. Lév.) A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma minimum Heynh. | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma minor A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma minus A.Nelson | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma minutiflora (S. Watson) Rydb. | Accepted |  | TRO | 
	
		| Sphaerostigma nelsonii A.Heller | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma nevadense (Kellogg) A.Heller | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma nitidum (Greene) Small | Synonym |  | TRO | 
	
		| Sphaerostigma orthocarpum A.Nelson & P.B.Kenn. | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma pallidum Abrams | Synonym |  | TRO | 
	
		| Sphaerostigma paradoxum Gay | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma parvulum (Nutt.) Walp. | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma pterospermum (S. Watson) A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma pubens (S. Watson) Rydb. | Synonym |  | TRO | 
	
		| Sphaerostigma ramosissimum Phil. | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma refractum (S.Watson) Small | Synonym |  | WCSP (in review) | 
	
		| Sphaerostigma rutilum (Davidson) Parish | Synonym |  | TRO | 
	
		| Sphaerostigma senex A.Nelson | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma spirale Fisch. & C.A.Mey. | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma spirale var. clypeatum (H. Lév.) A. Nelson | Unresolved |  | TRO | 
	
		| Sphaerostigma spirale var. viridescens (Hook.) A. Nelson | Synonym |  | TRO | 
	
		| Sphaerostigma strigulosum Fisch. & C.A. Mey. | Synonym |  | TRO | 
	
		| Sphaerostigma tenuifolium Gay | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma tortum (H. Lév.) A. Nelson | Accepted |  | TRO | 
	
		| Sphaerostigma tortuosum A.Nelson | Unresolved |  | WCSP (in review) | 
	
		| Sphaerostigma utahense Small | Synonym |  | TRO | 
	
		| Sphaerostigma veitchianum (Hook.) Small | Synonym |  | TRO | 
	
		| Sphaerostigma viridescens (Hook.) Walp. | Synonym |  | TRO |