Viola viarum Pollard. Phen: Apr-May. Hab: Moist to wet limestone gravel and bedrock riverbanks and streamsides, bluffs, bottomland prairies, and along roadsides and other disturbed areas formerly in natural habitat. Dist: Missouri River and Ozarks in central and lower Midwest, w. IL to se. SD, s. to MO, nw. LA and e. OK (specimens collected outside this region are not typical, do not inhabit the specific habitats of this species, and are suspected of being hybrids).
Origin/Endemic status: Native
Syn: = Il, Mo3; = Viola ×viarum – K3, K4; ? Viola esculenta – Tx; < Viola palmata var. palmata – FNA6