Lithospermum molle (Michx.) Muhl.
Common Name: MARBLEWEED, FALSE GROMWELL
Synonym: Onosmodium molle
Coefficient of Conservatism: 6
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt P-Forb
Status: X
Lithospermum molle J. Kelly

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.

Locations

Berrien County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2017. http://michiganflora.net/species.aspx?id=591.