Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
A weed of lawns, flower beds, barnyards; around buildings, sidewalks, and railroads; fields and sandy or gravelly disturbed ground. First collected in Michigan in 1869 at Detroit (Wayne Co.).
The bright pink flowers are conspicuous, but are not always produced by plants in stressed, weedy situations; seeds apparently setting in these plants from cleistogamous flowers.
This is a very cold tolerant plant, and will continue flowering well into November in sothern Michigan if frosts have not been too severe