Stems floating, 1.3-1.5 m, stout. Leaves floating, ca. 1.5 m × 1 cm, flattened, spongy, lower slightly convex on abaxial side. Racemes 20-35 cm, lower part ?curved; male heads 8-10; female heads 3 or 4(-7), sessile or lowest 1 or 2 pedunculate. Male flowers: perianth segments spatulate, 3-3.5 mm; filaments 3-4 mm; anthers linear, ca. 2 mm. Female flowers: perianth segments white, spatulate, 4-5 mm, lobate at apex; ovary fusiform, attenuate toward base; styles ca. 1.5 mm; stigmas oblong to ovate, 1.5-2 mm, lacerate or forked. Fl. and fr. May-Sep.
Home