Coefficient of Conservatism:
Coefficient of Wetness:
Ann Arbor Natural Area Preservation
Much more of a wetland species than P. canadensis: borders of marshes, swamps, ponds, and lakes; river banks, thickets, and springy slopes; fens (even in Sphagnum), meadows, and wet prairies.
The corolla is pale yellow or cream, not as variable as in P. canadensis. Even more than in P. canadensis, the margins of the leaf lobes are edged with hard white ceramic-like deposits.