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Calcareous, springy habitats, like fens, usually in flowing water.
In the U.S. from MI, WI, IL south to TX, west MT to NV, CA.
Creeping herbaceous perennial. Stems glabrous to minutely villous above. Leaves palmately veined, the upper mostly sessile. Flowers from upper leaf axils; corolla bright yellow with an open throat and bearded lower lip; calyx lobed broadly triangular, the uppermost largest and the other 4 very short or absent.
Flowers late May to late July
Wetland indicator: Facultative +
Synonyms include M. geyeri and M. glabratus var. jamesii. This is the most widespread variety of this species.
Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of
Northeastern United States
and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY
Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.
USDA, NRCS. 2002.
The PLANTS Database, Version 3.5 (http://plants.usda.gov).
National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Michael Hough © 2005