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 tumidissinoda

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 300–600 cm long; 10–30 mm diam.; woody; without nodal roots. Culm-internodes channelled; solid; 15–25 cm long; mid-green; smooth; distally glabrous. Culm-nodes flanged; glabrous, or pubescent. Lateral branches dendroid. Branch complement three, or several; in a horizontal line; with subequal branches; thinner than stem. Culm-sheaths deciduous; chartaceous; purple; hispid; with tawny hairs; hairy on margins; without auricles; setose on shoulders; shoulders with 2–3 mm long hairs. Culm-sheath ligule 1–1.3 mm high; ciliolate. Culm-sheath blade linear; deciduous; erect; 0.5–1.7 cm long. Leaves cauline; 2–4 per branch. Leaf-sheaths 2–2.5 cm long; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane; truncate, or obtuse. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate; 5–14 cm long; 6–12 mm wide. Leaf-blade venation with 4–8 secondary veins; with distinct cross veins. Leaf-blade surface smooth, or scaberulous; rough on both sides; glabrous.

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

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3–8 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 30–45 mm long; 2.5–4 mm wide; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; 2 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 lanceolate, or ovate; 10–14 mm long; chartaceous; without keel; 9 -veined. Lemma lateral veins with cross-veins. Lemma apex acute. Palea 8–12 mm long. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 1.5–2.5 mm long; membranous; ciliate. Anthers 3; 4–8 mm long; purple. Stigmas 2.

FRUIT Caryopsis with fleshy pericarp; 10–12 mm long. Endosperm evanescent.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Wen 1996.

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