Arundo donax

Bamboo-like perennial; culms erect, to 6 m high, usually >1 cm diam toward base. Leaves glabrous; blades mostly 30–80 cm long, 20–80 mm wide, somewhat glaucous; auricles rounded, yellowish; ligule 1–2 mm long. Inflorescences narrowly ovate, 30–70 cm long, contracted to loosely spreading, fluffy; spikelets abundant, 10–15 mm long, 3–5-flowered; glumes subequal or equal, 11–14 mm long, often tinged pink at least when young; lemma 2-lobed, 7–8mm long (excluding lobes), villous; lobes 1–2 mm long, central awn 1–3 mm long; palea about two-thirds as long as lemma, villous. Flowers Mar.–May.