Coefficient of Conservatism:
Coefficient of Wetness:
MARBLEWEED, FALSE GROMWELL
Onosmodium molle of Michigan Flora
Collected at Niles in 1838 by the First Survey (GH); not found in Michigan again, but relatively widespread in Ontario and Wisconsin and to be sought in dry places or on banks and shores.
We follow Cohen & Davis (2009) in uniting Onosmodium with Lithospermum. The long-styled flowers with straight acute corolla lobes are distinctive among our Lithospermum species. In fruit, this has much the appearance of a robust L. officinale, but has larger nutlets ca. 3.2–4.5 mm long; L. officinale has the nutlets ca. 2.5–3.2 mm long. The spreading pubescence is also distinctive; all our other species have the pubescence ± appressed.