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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 hejiangensis

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 500–700 cm long; 20–30 mm diam.; woody; with root thorns from the nodes. Culm-internodes terete; 20 cm long; mid-green; smooth; distally pubescent. Culm-nodes constricted; purple; glabrous. Lateral branches dendroid. Branch complement three; in a horizontal line; with subequal branches; thinner than stem. Culm-sheaths persistent; coriaceous; green; concolorous; hispid; hairy on margins; without auricles; glabrous on shoulders. Culm-sheath blade triangular; erect; 0.7–1.4 cm long. Leaves cauline; 3–5 per branch. Leaf-sheaths deciduous. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; linear, or lanceolate; 11–20 cm long; 10–20 mm wide. Leaf-blade venation with 8–12 secondary veins; with distinct cross veins. Leaf-blade surface glabrous.

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

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 9–10 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 10–12 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 ovate; chartaceous; without keel; 7–9 -veined. Lemma lateral veins with cross-veins. Lemma apex acute. Palea 1 length of lemma. Palea apex emarginate. 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.