Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
Roadsides and railroads, ditches, river banks, clearings and sandy disturbed ground. Spreading rapidly along highways in recent years, although known from banks of the Red Cedar River in East Lansing, Ingham Co., as early as 1894. Capable of occurring in wetlands and a potential invader into natural communities.
A conspicuous tall and impressively bristly plant, often 2–3 m or even more in height. The connate bases of the cauline leaves form a conspicuous cup ca. 1.5–7 (–13) cm deep around the stem at some nodes. See notes under D. fullonum.