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Phyllostachys bambusa

PHYLLOSTACHYS Sieb. & Zucc.
Plants hermaphroditic, rhizomatous, perennial. Culms arborescent (3-20 m tall), erect or ascending, primary branches per mid-culm node 2 then rebranching, glabrous; internodes hollow, semiterete (flattened on 1-side). Leaves cauline, not distinctly distichous; sheath terete, margins open, deciduous at maturity; auricles present or absent; ligules membranous or a ciliate membrane; blades flat, wide, pseudopetiolate, tessellate (cross-veined). Reproductive structures not produced every year, seldom flowering. Panicles or racemes (or single spikelets) open, branches or pedicels spreading or ascending. Spikelets solitary (1.8-8 cm long), laterally compressed, disarticulation above the glumes, awnless or mucronate, pedicellate; florets 3-6, callus glabrous, rachilla not extended beyond upper floret; glumes 1 or 2 or 3, many-veined, slightly unequal, shorter than the first floret, glabrous, awnless; lemmas many-veined, membranous or chartaceous, glabrous, apex acuminate, awnless or mucronate; paleas several-veined, 2-keeled, awnless, glabrous. Stamens 3. Caryopses longitudinally grooved. Base chromosome number x=6. A genus of about 50 species.