Coefficient of Conservatism:
Coefficient of Wetness:
Sandy shores of the Great Lakes and nearby disturbed sites; roadsides, railroads, gravelly bluffs, especially inland.
Often called P. graveolens Raf. Variety dodecandra is considered native in our area and elsewhere in eastern North America, and has petals that do not exceed 8 mm in length (usually ca. 4–6 mm). In var. trachysperma (Torr. & A. Gray) Iltis, sometimes treated as a distinct species, the petals are longer, ca. 10–12 (–15) mm in our material; this sometimes cultivated showier western North American variety is adventive or escaped into disturbed areas locally in southern Michigan (records from Jackson, Kalamazoo, Kent, Mecosta, Ottawa, and Wayne Cos.) In both varieties, the leaves, stems, and fruit are ± densely glandular-pubescent, and the clammy plant has a rank odor.