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Descriptions

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

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

Chimonobambusa damingshanensis

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 150–200 cm long; 6–8 mm diam.; woody; with aerial roots from the nodes. Culm-internodes terete; with small lumen; 10–13 cm long; smooth; distally glabrous, or pubescent. Culm-nodes flush with internodes, or swollen; pubescent. Lateral branches dendroid. Branch complement one, or two, or three; in a horizontal line; with subequal branches; thinner than stem. Culm-sheaths persistent; 1.1 length of internode; chartaceous; green and white; distinctly mottled with last colour; hispid; with tawny hairs; hairy on margins; without auricles; glabrous on shoulders. Culm-sheath ligule ciliolate. Culm-sheath blade linear; deciduous; erect; 0.3–0.4 cm long. Leaves cauline; 4–6 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs setose; 11 mm long. Ligule an eciliate membrane; 6 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate; 15–18 cm long; 11–13 mm wide. Leaf-blade venation with distinct cross veins.

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

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 4–5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 12 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; 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 mm long; 3–4 mm wide; chartaceous; without keel; 5–7 -veined. Lemma lateral veins with cross-veins. Lemma apex setaceously attenuate. Palea 6–7 mm long; 0.6–0.8 length of lemma. Palea apex 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.

NOTES Arundinarieae. Wen 1996.

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