Publication: Proc. Acad. Nat. Sci. Philadelphia. 4: 15. (as microtheca). 1848.
Origin: Native
Herbarium search: CPNWH
Notes: From IPNI:"Nuttall used the epithet "microtheca" as a noun in apposition," and this spelling is, therefore, grammatically correct." Furthermore, an attempt to overturn the original orthography was not recommended by the Nomenclature Committee for Vascular Plants, Applequist, Taxon 63(6): 1368 (2014), nor by the General Committee.
Infraspecies:
Last updated 10/6/2020 by David Giblin.