Leaves up to 10 mm wide, basal, ribbon-like, obtuse or rounded at the apex, denticulate towards the apex, with reddish dots or short streaks. Male spathes ovoid, shortly pedunculate. Peduncles of female spathes filiform, becoming spirally coiled after anthesis; sepals of female flowers 1.75-4 mm, pinkish-white.
Stems creeping and stoloniferous, narrowly terete, 0.6–1.9 mm. in diameter. Leaves 0.5–40(–57) cm. long, 1.7–12 mm. wide, mid-green to dark green with numerous, minute, longitudinal and transverse reddish brown striations; leaf-margins green, entire to coarsely serrate. Male spathe with peduncle up to 7 cm. long; spathe 4–5.5 mm. long, 2.3–2.5 mm. wide, light brown, containing up to ± 50 flowers. Male flowers: sepals up to ± 0.5 mm. long. Female spathe: peduncle up to 100 cm. long; body of spathe 8–19 mm. long, 0.95–2 mm. wide, whitish to light brown. Female flower: sepals narrowly ovate to ovate, 1.8–3 mm. long, 0.7–1.8 mm. wide, light brown to reddish brown, often dotted or striated with dark reddish brown; petals narrowly ovate, ± 0.5 mm. long, ± 0.2 mm. wide; ovary 10–25 mm. long, ± 1 mm. wide; stigmas shallowly or deeply bifid, fringed, ± 2 mm. long. Fruit 10–30 mm. long, 1–1.5 mm. wide, brown or reddish brown, often dotted or striated with dark reddish brown. Seeds 1.3–2 mm. long, ± 0.5 mm. wide, papillose, brown, with reddish brown striations. Fig. 5.
HAB. Still, fresh or brackish water up to 3.5 m. deep; 475–1800 m.
Uganda Entebbe, edge of Lake Victoria, Jan. 1938, Chandler 2091!
Tanzania Lake Malawi, Lukoma, 1887, Bellingham !
Kenya Nandi hills, 25 Aug. 1985, Odero 1!
Tanzania Lake Province: shores of Lake Victoria, 26 Oct. 1938, Vanderplank !
Tanzania in Lake Tanzania, 20 December 1971, Harris 6073!
Uganda Lake Victoria, Jinja, Ekunu Bay, 30 Dec. 1955, Roberts in EAH. 1/1951! & Jinja, Napoleon Bluff, Apr. 1955, Greenway 8828
Sp. Pl.: 1015 (1753); Guerke in P.O.A. C: 95 (1895); Wright in F.T.A. 7: 5 (1897); U.KW.F.: 649 (1974); Lowden in Aquat. Bot. 13: 285, fig. 3 (1982).