Sparganium americanum Nuttall. Phen: May-Sep. Hab: Streams, marshes, ponds, pools, spring branches, often submerged. Dist: NL (Newfoundland) west to MN, south to c. peninsular FL and c. TX.
Origin/Endemic status: Native
Syn: = Ar, C, ETx1, F, FNA22, G, GW1, Il, K1, K4, Mi, Mo1, NE, NY, Pa, RAB, S, Tn, Tx, Va, W, WH3, WV, Beal (1960), Cook & Nicholls (1986), Crow & Hellquist (2000b), Thieret (1982)