Rotala ramosior (L.) Koehne
Common Name: TOOTH-CUP
Coefficient of Conservatism: 8
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt A-Forb

Rotala ramosior A. A. Reznicek

Sandy to mucky shores, interdunal swales, and clearings, usually periodically inundated.

Under magnification (20×) and good illumination, the surface of the capsule appears covered with minute transverse striations, while in Ammannia it is smooth. This easily overlooked little plant is sometimes confused with Ammannia and also with the common Ludwigia palustris, which usually has much broader leaves than the linear to narrowly elliptic ones of Rotala, and which also has longer calyx lobes without appendages between them.

Locations

Allegan County
Barry County
Berrien County
Cass County
Gratiot County
Kalamazoo County
Lake County
Mason County
Monroe County
Muskegon County
Newaygo County
Ottawa County
Van Buren County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2017. http://www.michiganflora.net/species.aspx?id=1663.