Menyanthaceae

1. Leaves emergent, not floating, trifoliate; flowers in a raceme, white

Menyanthes

1. Leaves floating, simple; flowers born in an umbel, on long pedicles, yellow (in our species)

Nymphoides

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 24, 2017. http://michiganflora.net/family.aspx?id=MENYANTHACEAE.