Perennial, aquatic. Culms creeping and rooting from nodes at base, sometimes floating, up to 30 m long, ca. 1 cm in diam., flowering stems up to 2 m tall, more than 10-noded. Leaf sheaths smooth, glabrous or upper sheaths tuberculate-hispid; leaf blades narrowly to broadly linear, up to 100 × (0.3–)1–2.5 cm, hispid with tubercle-based hairs on both surfaces or almost glabrous, midvein stout, base rounded, margins scabrous, apex slenderly acuminate; ligule ca. 1 mm, margin ciliate. Male raceme 2.5–7 cm, drooping, spikelets mostly in triads, closely imbricate; utricle ovoid, longer than broad, bony, shiny, 10–14 × 5–7 mm, white or pale brown, sometimes with a median transverse line, apex occasionally extended into a green blade. Male spikelets broadly elliptic, 8–12 mm; glumes many-veined, lower glume winged on keels, wing (0.4–)0.7–1.2(–1.5) mm wide, margin ciliolate; anthers 4–5.5 mm. Fl. and fr. Aug–Nov. 2n = 10, 20, 40. Perennial, aquatic. Culms creeping and rooting from nodes at base, sometimes floating, up to 30 m long, ca. 1 cm in diam., flowering stems up to 2 m tall, more than 10-noded. Leaf sheaths smooth, glabrous or upper sheaths tuberculate-hispid; leaf blades narrowly to broadly linear, up to 100 × (0.3–)1–2.5 cm, hispid with tubercle-based hairs on both surfaces or almost glabrous, midvein stout, base rounded, margins scabrous, apex slenderly acuminate; ligule ca. 1 mm, margin ciliate. Male raceme 2.5–7 cm, drooping, spikelets mostly in triads, closely imbricate; utricle ovoid, longer than broad, bony, shiny, 10–14 × 5–7 mm, white or pale brown, sometimes with a median transverse line, apex occasionally extended into a green blade. Male spikelets broadly elliptic, 8–12 mm; glumes many-veined, lower glume winged on keels, wing (0.4–)0.7–1.2(–1.5) mm wide, margin ciliolate; anthers 4–5.5 mm. Fl. and fr. Aug–Nov. 2n = 10, 20, 40.General Information
Source: [
Flora of China @ efloras.org
General Information
