Coefficient of Conservatism:
Coefficient of Wetness:
Dry to somewhat moist, usually sandy, often ± disturbed areas: roadsides and railroads, shores and dunes, fields,; openings in aspen and pine savannas.
The flowers are occasionally whitish or cream, and such plants, especially if they have unusually small flowers, might key to A. ovalifolia, but that species is much more delicate in stature. Flowers in the large umbels sometimes shrivel in drying so that they appear to be less than 10.5 mm long, but well-pressed flowers can usually be found at least that long.
The follicles (“pods”) are occasionally smooth (as in A. purpurascens), but usually are ± prominently warty or tuberculate.
Hybridizes with A. speciosa and rarely with A. exaltata and A. purpurascens.