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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 montigena

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 150–300 cm long; 7–14 mm diam.; woody; without nodal roots. Culm-internodes terete; with small lumen; 13–19 cm long; smooth; distally mealy. Culm-nodes flush with internodes; bearded. Lateral branches dendroid. Branch complement three; in a horizontal line; with subequal branches; thinner than stem. Culm-sheaths deciduous; coriaceous; hispid; hairy at the base; with dark brown hairs; hairy on margins; without auricles; glabrous on shoulders. Culm-sheath blade lanceolate; erect; 0.8–1.5 cm long. Leaves cauline; 2–5 per branch. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane; 1 mm long; obtuse. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate; 8–15 cm long; 10–26 mm wide. Leaf-blade venation with 8–10 secondary veins; with distinct cross veins.

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

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 20–32 mm long; 3–5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2–4 mm long; glabrous.

GLUMES Glumes one the lower absent or obscure; 1 empty glumes; persistent; shorter than spikelet. Upper glume lanceolate; 10–20 mm long; membranous; without keels; 9–11 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 9–13 mm long; chartaceous; without keel; 9–11 -veined. Lemma apex acute. Palea 9–13 mm long; 8–10 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 2–2.5 mm long; membranous; glabrous, or ciliate. Anthers 3; 5–6 mm long. Stigmas 2–3.

FRUIT Caryopsis with fleshy pericarp; 7–13 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.