Viola nephrophylla Greene. Phen: May. Hab: Strongly calciphilic, seasonally or perennially saturated open sites such as bedrock pavement, rocky shores, fens, marl bogs and wet prairies, occasionally in disturbed sites especially around crushed limestone. Dist: NL (Newfoundland) and YT south to PA, WV, VA (where perhaps only introduced), IN, IL, LA, TX, and CA.
Origin/Endemic status: Native
Syn: = C, F, FNA6, G, GrPl, K1, K3, Mo3, NE, Tx, WV, Ballard () (in prep), Haines (2001); < Viola nephrophylla – K4