''Cymopterus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of perennial plants in the family

Apiaceae Apiaceae or Umbelliferae is a family of mostly aromatic flowering plants named after the type genus ''Apium'' and commonly known as the celery, carrot or parsley family, or simply as umbellifers. It is the 16th-largest family of flowering plants ...

native to western North America. They are commonly known as the springparsleys.''Cymopterus''.
USDA PLANTS. They are mostly stemless,

taproot A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward. In some plants, such as the carrot, the taproo ...

ed perennial herbs with leaves at ground level and flowering scapes bearing yellow, white, or purple flowers.''Cymopterus''.
The Jepson eFlora 2013.

Taxonomy

The taxonomy of this genus was described as confused in 2004, even after many decades of study.Sun, F. and S. R. Downie. (2004)
A molecular systematic investigation of Cymopterus and its allies (Apiaceae) based on phylogenetic analyses of nuclear (ITS) and plastid (''rps16'' intron) DNA sequences.
''South African Journal of Botany'' 70(3), 407-16. 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.Hartman, R. L. and G. L. Nesom. (2012)
Taxonomy of the genus ''Vesper'' (Apiaceae).
''Phytoneuron'' 94 1-9. The number of accepted species has varied between about 50 to about 35.Downie, S. R., et al. (2002)
Polyphyly of the spring-parsleys (''Cymopterus''): molecular and morphological evidence suggests complex relationships among the perennial endemic genera of western North American Apiaceae.
''Canadian Journal of Botany'' 80(12), 1295-1324.

Species

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

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 ''Vesper multinervatus'', synonym ''Cymopterus multinervatus'', is a species of flowering plant in the carrot family Apiaceae, known by the common name purplenerve springparsley. It is a perennial herb native to the southwestern United States, i ...

'' (as ''Cymopterus multinervatus'') *''

Vesper purpurascens ''Vesper purpurascens'', synonym ''Cymopterus purpurascens'', is a species of flowering plant in the carrot family Apiaceae, known by the common name widewing springparsley. It is native to much of the western United States, including the desert ...

'' (as ''Cymopterus purpurascens'')

Taxonomy

Species

Formerly included here

References

Further reading