Elatine triandra Schkuhr
-
Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
-
Family
Elatinaceae
-
Scientific Name
-
Description
Species Description - Creeping or floating annual; lvs linear to obovate, 3–8 mm; fls mostly 3-merous; seeds axile, set at different levels in the fr, marked with transversely elongate, 6-sided areoles, the angular ends of the areoles dovetailed with those of adjacent rows, the longitudinal ridges appearing narrow or broken; 2n=ca 40. Three vars.: Var. triandra has linear to spatulate, often retuse lvs, and seeds with 16–26 areoles in each longitudinal row; Wis. and N.D. to Wash. and Calif., also in Eurasia, and intr. in Me. Var. americana (Pursh) Fassett has obovate, rarely retuse lvs, otherwise like var. triandra; muddy tidal shores, Que. and N.B. to Va., and also in Mo. Var. brachysperma (A. Gray) Fassett has obovate lvs, and seeds with 9–15 areoles in each longitudinal row; s. O. and c. Ill. to w. U.S.