Coefficient of Conservatism:
Coefficient of Wetness:
A Eurasian species (or complex), reported from Michigan as early as the First Survey (1838) although the oldest collection seen is from 1850 (Macomb Co.). Especially common in the northern part of the state, in moist forests and thickets, particularly in logging trails, borders, and clearings; also along rivers, streams, and gravelly shores; yards, refuse heaps, and other disturbed ground.
Corolla color is pink or white, both forms being frequent and at times growing together. The density of the hairs on the retrorse-hispid stem is also variable.
Much of our material is var. bifida (Boenn.) Lej. & Courtois, sometimes recognized as a closely related species, G. bifida Boenn., with the middle lobe of the lower lip ± notched rather than entire and squarish. Both seem to have similar ranges in the state, but many collections are insufficient for accurate determination. Only material with flowers should be gathered and collectors should note the shape of the middle lobe of the lip and carefully press the flowers to preserve the lip shape. One collection from Alger Co. appears to be intermediate; presumably a hybrid.