Coefficient of Conservatism:
Coefficient of Wetness:
A European species, at borders, trails, and openings in dry rocky forests; yards and fencerows. Still rather uncommon, but first collected as long ago as 1886 in Keweenaw Co.
Like H. maculatum, quite attractive with its large heads and relatively few, large, toothed leaves. This is the species long called H. vulgatum Fries by American authors.