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.

Chimonobambusa armata

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 500–900(–1200) cm long; 35–50(–80) mm diam.; woody; with root thorns from the nodes. Culm-internodes quadrangular; hollow; 12–20 cm long; mid-green; smooth, or scaberulous; distally glabrous. Culm-nodes flush with internodes; pubescent. Lateral branches dendroid. Branch complement three; in a horizontal line; with subequal branches; thinner than stem. Culm-sheaths tardily deciduous; 1–1.1 length of internode; chartaceous; green and purple; distinctly mottled with last colour; pilose; hairy on margins; without auricles; glabrous on shoulders. Culm-sheath ligule 2–3 mm high; ciliate. Culm-sheath blade triangular; erect; 0.5–1.3 cm long; pubescent. Leaves cauline; 3–5 per branch. Leaf-sheaths striately veined; glabrous on surface. Leaf-sheath oral hairs scanty. Ligule a ciliolate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades persistent; lanceolate, or oblong; 15–23 cm long; 20–30 mm wide; light green. Leaf-blade venation with 12 secondary veins; with distinct cross veins. Leaf-blade surface scaberulous; rough abaxially; pubescent; hairy adaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; scanty; with glumaceous subtending bracts; with axillary buds at base of spikelet.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 7–10 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 50–80 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; 3–4 empty glumes; persistent; similar; shorter than spikelet. Lower glume lanceolate; membranous; without keels. Lower glume apex acute. Upper glume lanceolate; membranous; without keels. Upper glume apex acute.

FLORETS Fertile lemma ovate; 8–9 mm long; chartaceous; without keel; 7–9 -veined. Lemma lateral veins with cross-veins. Lemma apex acute. Palea 1 length of lemma. Palea apex entire, or dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; membranous; ciliate. Anthers 3. Stigmas 2.

FRUIT Caryopsis with fleshy pericarp. Endosperm evanescent.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India.

NOTES Arundinarieae. Wen 1996.

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