| Lewisia alba Kellogg | Synonym |  | TRO |  | 
	
		| Lewisia aridorum (A.Heller) S.Clay | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia aurantiaca A.Nelson | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia bernardina Davidson | Synonym |  | TRO |  | 
	
		| Lewisia brachycalyx Engelm. ex A. Gray | Accepted |  | TRO |  | 
	
		| Lewisia brachycarpa S. Watson | Synonym |  | TRO |  | 
	
		| Lewisia cantelovii J.T. Howell | Accepted |  | TRO |  | 
	
		| Lewisia columbiana (Howell ex A. Gray) B.L. Rob. | Accepted |  | TRO |  | 
	
		| Lewisia columbiana var. columbiana | Synonym |  | TRO |  | 
	
		| Lewisia columbiana subsp. columbiana | Synonym |  | TRO |  | 
	
		| Lewisia columbiana subsp. congdonii (Rydb.) R.S. Ferris | Synonym |  | TRO |  | 
	
		| Lewisia columbiana subsp. rupicola (English) R.S. Ferris | Synonym |  | TRO |  | 
	
		| Lewisia columbiana var. rupicola (English) C.L. Hitchc. | Accepted |  | TRO |  | 
	
		| Lewisia columbiana var. wallowensis C.L. Hitchc. | Accepted |  | TRO |  | 
	
		| Lewisia columbiana subsp. wallowensis (C.L. Hitchc.) J.E. Hohn ex B. Mathew | Synonym |  | TRO |  | 
	
		| Lewisia congdonii (Rydb.) S. Clay | Accepted |  | TRO |  | 
	
		| Lewisia cotyledon (S. Watson) B.L. Rob. | Accepted |  | TRO |  | 
	
		| Lewisia cotyledon var. cotyledon | Synonym |  | TRO |  | 
	
		| Lewisia cotyledon var. heckneri (C.V. Morton) Munz | Accepted |  | TRO |  | 
	
		| Lewisia cotyledon var. howellii (S. Watson) Jeps. | Accepted |  | TRO |  | 
	
		| Lewisia cotyledon var. purdyi Jeps. | Synonym |  | TRO |  | 
	
		| Lewisia crenulata S.Clay | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia disepala Rydb. | Accepted |  | TRO |  | 
	
		| Lewisia eastwoodiana Purdy | Synonym |  | TRO |  | 
	
		| Lewisia exarticulata H. St. John | Synonym |  | TRO |  | 
	
		| Lewisia finchiae Purdy | Synonym |  | TRO |  | 
	
		| Lewisia glandulosa (Rydb.) Dempster | Synonym |  | TRO |  | 
	
		| Lewisia heckneri (C.V. Morton) R.B. Sm. | Synonym |  | TRO |  | 
	
		| Lewisia howellii (S. Watson) B.L. Rob. | Synonym |  | TRO |  | 
	
		| Lewisia kelloggii K. Brandegee | Accepted |  | TRO |  | 
	
		| Lewisia kelloggii subsp. hutchisonii Dempster | Synonym |  | TRO |  | 
	
		| Lewisia leana B.L.Rob. | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia leeana (Porter) B.L. Rob. | Accepted |  | TRO |  | 
	
		| Lewisia longifolia S.Clay | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia longipetala (Piper) S. Clay | Accepted |  | TRO |  | 
	
		| Lewisia maguirei A.H. Holmgren | Accepted |  | TRO |  | 
	
		| Lewisia mariana S.Clay | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia megarhiza (Hemsl.) MacBryde | Synonym |  | TRO |  | 
	
		| Lewisia mexicana (Rydb.) S. Clay | Accepted |  | TRO |  | 
	
		| Lewisia millardii S.Clay | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia minima (A. Nelson) A. Nelson | Synonym |  | TRO |  | 
	
		| Lewisia minor Rydb. | Synonym |  | TRO |  | 
	
		| Lewisia nevadensis (A. Gray) B.L. Rob. | Accepted |  | TRO |  | 
	
		| Lewisia oppositifolia (S. Watson) B.L. Rob. | Accepted |  | TRO |  | 
	
		| Lewisia purdyi (Jeps.) Gabrielson | Synonym |  | TRO |  | 
	
		| Lewisia pygmaea (A. Gray) B.L. Rob. | Accepted |  | TRO |  | 
	
		| Lewisia pygmaea var. aridorum Bartlett | Synonym |  | TRO |  | 
	
		| Lewisia pygmaea subsp. glandulosa (Rydb.) R.S. Ferris | Synonym |  | TRO |  | 
	
		| Lewisia pygmaea subsp. longipetala (Piper) R.S. Ferris | Synonym |  | TRO |  | 
	
		| Lewisia pygmaea var. nevadensis (A. Gray) Fosberg | Synonym |  | TRO |  | 
	
		| Lewisia pygmaea var. pygmaea | Synonym |  | TRO |  | 
	
		| Lewisia pygmaea subsp. pygmaea | Synonym |  | TRO |  | 
	
		| Lewisia rediviva Pursh | Accepted |  | TRO |  | 
	
		| Lewisia rediviva var. minor (Rydb.) Munz | Accepted |  | TRO |  | 
	
		| Lewisia rediviva subsp. minor (Rydb.) A.H. Holmgren | Synonym |  | TRO |  | 
	
		| Lewisia rediviva var. rediviva | Synonym |  | TRO |  | 
	
		| Lewisia rediviva var. yosemitana K. Brandegee | Synonym |  | TRO |  | 
	
		| Lewisia richeyi S.Clay | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia rupicola English | Synonym |  | TRO |  | 
	
		| Lewisia sacajaweana B.L.Wilson | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia serrata Heckard & Stebbins | Synonym |  | TRO |  | 
	
		| Lewisia sierrae R.S. Ferris | Synonym |  | TRO |  | 
	
		| Lewisia stebbinsii Gankin & W.R. Hildreth | Accepted |  | TRO |  | 
	
		| Lewisia triphylla (S.Watson) B.L.Rob. | Synonym |  | WCSP (in review) |  | 
	
		| Lewisia tweedyi (A.Gray) B.L.Rob. | Accepted |  | WCSP (in review) |  | 
	
		| Lewisia whiteae Purdy | Unresolved |  | WCSP (in review) |  | 
	
		| Lewisia yosemitana Jeps. | Synonym |  | TRO |  |