Coefficient of Conservatism:
Coefficient of Wetness:
Dry sandy prairies, fields, plains, clearings, and oak or jack pine savannas; associated roadsides and railroads.
White-flowered plants are f. benkei (J. F. Macbr.) Fernald, and have been recorded from Kalamazoo, Mecosta, Newaygo, and Ottawa Cos.
The two Farwell collections (both Farwell 89, but one dated 1884 and another 1889) seem suspect, although this species is known from farther south and east in the western Upper Peninsula