Callitriche stagnalis Scopoli. Phen: May-Oct. Hab: Ponds, stagnant water, wet soil. Dist: Native of Europe, or possibly also native in some areas. See Philbrick, Aakjar, & Stuckey (1998) for additional discussion of the spread of this species in North America.
Origin/Endemic status: Europe
Syn: = C, F, FNA17, G, K1, K3, K4, NE, NY, Pa, Tn, Crow & Hellquist (2000a), Fassett (1951), Lansdown (2009)