Cymopterus

Cymopterus is a genus of perennial plants in the family Apiaceae native to western North America. They are commonly known as the spring parsleys and are edible. They are mostly stemless, taprooted perennial herbs with leaves at ground level and flowering scapes bearing yellow, white, or purple flowers.

Taxonomy
The taxonomy of this genus was described as confused in 2004, even after many decades of study. Authors have organized it in different ways, sometimes including several closely related Apiaceae genera within it. Genera recently segregated from Cymopterus include Vesper, six plants with morphological characters that are well-defined and easily separated from Cymopterus; the group has been separated before, but was reintegrated during repeated reorganizations of the genus. The number of accepted species has varied between about 50 to about 35.

Species
, Plants of the World Online accepted the following species:
 * Cymopterus aboriginum M.E.Jones – Indian parsnip, Indian springparsley
 * Cymopterus alpinus A.Gray
 * Cymopterus anisatus A.Gray
 * Cymopterus basalticus M.E.Jones – basalt springparsley
 * Cymopterus beckii S.L.Welsh & Goodrich – featherleaf springparsley
 * Cymopterus cinerarius A.Gray – gray springparsley
 * Cymopterus crawfordensis K.Moon, S.L.Welsh & Goodrich
 * Cymopterus davidsonii (J.M.Coult. & Rose) R.L.Hartm.
 * Cymopterus davisii R.L.Hartm. – Davis' springparsley
 * Cymopterus deserticola Brandegee – desert springparsley
 * Cymopterus douglassii R.L.Hartm. & Constance – Douglass' springparsley
 * Cymopterus duchesnensis M.E.Jones – Duchesne biscuitroot, Uinta Basin springparsley
 * Cymopterus evertii R.L.Hartm. & R.S.Kirkp. – Evert's springparsley
 * Cymopterus gilmanii C.V.Morton – Gilman's springparsley
 * Cymopterus glaucus Nutt. – smooth springparsley, waxy springparsley
 * Cymopterus globosus (S.Watson) S.Watson – globe springparsley
 * Cymopterus glomeratus (Nutt.) DC. – plains springparsley
 * Cymopterus goodrichii S.L.Welsh & Neese – Goodrich's springparsley, Toiyabe springparsley
 * Cymopterus hallii (A.Gray) B.L.Turner
 * Cymopterus humilis (Raf.) Tidestr.
 * Cymopterus jonesii J.M.Coult. & Rose – Jones' springparsley
 * Cymopterus longipes S.Watson – longstalk springparsley, sprawling springparsley
 * Cymopterus megacephalus M.E.Jones – largeleaf springparsley
 * Cymopterus minimus (Mathias) Mathias – Cedar Breaks springparsley
 * Cymopterus newberryi (S.Watson) M.E.Jones – sweetroot springparsley, sticky springparsley
 * Cymopterus nivalis S.Watson – snowline springparsley, Elko springparsley
 * Cymopterus panamintensis J.M.Coult. & Rose – Panamint springparsley
 * Cymopterus petraeus M.E.Jones
 * Cymopterus purpureus S.Watson – purple springparsley, Colorado Plateau springparsley, variable springparsley
 * Cymopterus ripleyi Barneby – Ripley's springparsley
 * Cymopterus rosei (M.E.Jones ex Coult. & Rose) M.E.Jones – Rose's springparsley
 * Cymopterus sessiliflorus (W.L.Theob. & C.C.Tseng) R.L.Hartm.
 * Cymopterus spellenbergii R.L.Hartm. & J.E.Larson
 * Cymopterus terebinthinus (Hook.) Torr. & A.Gray – turpentine wavewing
 * Cymopterus williamsii R.L.Hartm. & Constance – Williams' springparsley

Formerly included here

 * Vesper multinervatus (as Cymopterus multinervatus)
 * Vesper purpurascens (as Cymopterus purpurascens)