Sinobambusa Makino ex Nakai

Abstract

Shrubby to arborescent bamboos. Rhizomes monopodium or amphipodium. Culms diffuse or diffuse mixed with caespitose, erect; internodes terete, flat at the base of the branching side or occasionally grooved; sheath-nodes prominent, as tall as culm-nodes or lower than culm-nodes on nodes with branches. Branches 3, sometimes 5–7, nearly equal in size. Culm-sheaths deciduous, thickly papery to leathery, densely setose abaxially at the base; auricles developed or absent; ligules arched, entire; blades lanceolate, deciduous. Leaves 3–9 per branchlet; blades lanceolate, transverse veins conspicuous. Flowering branches with leaves or leafless, racemose or paniculate; pseudospikelet usually solitary, lateral pseudospikelets subtended by 1 prophyll; bracts 2 to several, gradually larger apically, the upper 1–2 bracts with buds, buds germinating into secondary pseudospikelets; pseudospikelets long, florets more than 50, rachilla disarticulated when mature; glumes usually absent, sometimes 1; lemma with ribs and transverse veins, apex acute, with a cusp; palea 2-keeled, apex blunt, keels and apex ciliate; lodicules (2) 3, veins many, margins ciliate; stamens 3, sometimes 2 or 4, filaments free; style 1, sometimes 2 or 3, stigmas 2 or 3, plumose. New shoots spring to early summer.