Acmispon americanus var. helleri
J. Bot. Res. Inst. Texas 2: 388. 2008.
Endemic
Basionym: Lotus helleri Britton Bull. Torrey Bot. Club 17: 312. 1890
Synonyms: Acmispon helleri (Britton) A. Heller Hosackia helleri (Britton) Brand L. purshianus var. helleri (Britton) Isely L. unifoliatus var. helleri (Britton) Kartesz & Gandhi
Treatment appears in FNA Volume 11.
Herbs glabrate. Leaflet blades: length 4–5 times width. 2n = 14.
Phenology: Flowering late summer–early fall.
Habitat: Woodlands, river bottoms, pastures, old fields, ditches, roadsides.
Elevation: 100–200 m.
Distribution
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Ga., N.C., S.C., Va.
Discussion
Variety helleri is the only Acmispon present east of the Appalachian Mountains. Although sometimes recognized at the species level (for example, B. A. Sorrie 2015), differences with var. americanus appear insufficient to warrant species status. The report by P. Lesica (2012) of this variety in Colorado is probably based on specimens of var. americanus.
Selected References
None.
Lower Taxa
None.