GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Bambusa pervariabilis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 700–1000 cm long; 40–45 mm diam.; woody; without nodal roots. Culm-internodes terete; 30 cm long; distally pruinose, or pilose. Lateral branches dendroid; arising from lower culm. Buds or branches present on lower quarter of culm. Branch complement several, or many; with 3 branches dominant; thinner than stem. Culm-sheaths deciduous; glabrous, or pubescent; convex at apex; auriculate; with unequal auricles; ciliate on shoulders. Culm-sheath ligule 3–4 mm high; dentate, or lacerate, or fimbriate. Culm-sheath blade ovate; narrower than sheath; deciduous; erect. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear, or lanceolate; 10–15 cm long; 10–15 mm wide.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.

FERTILE SPIKELETS Spikelets comprising 5–10 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 20–50 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 4 mm long.

GLUMES Glumes several; comprising 2–3 gemmiferous bracts; 1 empty glumes; persistent; similar; shorter than spikelet. Lower glume oblong; 6 mm long; without keels; 9 -veined. Lower glume surface glabrous. Lower glume apex acute.

FLORETS Fertile lemma lanceolate, or oblong; 12–14 mm long; without keel; 13–15 -veined. Lemma surface glabrous. Lemma apex acute. Palea 1 length of lemma; 14 -veined; 2-keeled. Palea keels wingless. Palea apex ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 2.7–3 mm long; membranous; ciliate. Anthers 6; 5 mm long. Stigmas 3. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; ovoid; 1.5 mm long; hairy at apex.

DISTRIBUTION Asia-temperate: China.

NOTES Bambuseae. Fl China 2005.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.