Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
In moist, usually rather open ground, at edges of streams, rivers, cat-tail marshes, etc.; ditches, sandy excavations, and along railroads; probably originally wet prairies. Spreading by tuber-bearing rhizomes.
This is a large, conspicuous, and easily recognized species. Many northern records are probably recent introductions.