Sagittaria montevidensis Cham. & Schltdl.
-
Authority
Bogin, Clifford. 1955. Revision of the genus Sagittaria (Alismataceae). Mem. New York Bot. Gard. 9 (2): 179-233.
-
Family
Alismataceae
-
Scientific Name
-
Description
Species Description - Fibrous-rooted annual, or perennial with short, thick rhizome. Leaves exceedingly variable, emersed, floating or submerged, typically emersed, prominently veined and sagittate, the blades linear to widely ovate, 2-20 x 0.4-25 cm, the linear to ovate, divergent lobes 2-20 x 0.3-15 cm, occasionally reduced or absent, the floating leaves ovate, to 2.5 x 1.5 cm, the submerged leaves reduced to phyllodia 3-45 x 0.4-1.2 cm, occasionally with spatulate ends to 1.5 cm wide, the petioles 8-70 cm long. Scape 7-75 cm long, with 2-12 whorls of flowers, simple or branching from the lowest whorl. Bracts connate, 0.2-2.5 cm long, membranous or occasionally thickened, the tips attenuate or reduced. Pistillate flowers with thickened, recurved pedicels 1-7 cm long; sepals broadly ovate, 0.6-1.5 x 0.6-1.5 cm, closely appressed to the mature receptacle; petals ovate, to 2.2 cm long, white or with purple marking at the base; ring of 9-12 functional stamens occasionally present. Staminate flowers with filiform divaricate pedicels 1-4 cm long; stamens 12-[infinity], with linear or dilated, glabrous or pubescent filaments 0.7-3.5 mm long, the obolong anthers 0.4-1.3 mm long. Mature pistillate heads 0.7-2.5 cm in diameter; achenes narrowly winged, 1.5-3 x 0.6-1.5 mm, the faces with a single short resin duct, or unadorned, the laterally or obliquely inserted beak 0.3-0.9 mm long.