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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 szechuanensis

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 300–400 cm long; 10–20 mm diam.; woody; with root thorns from the nodes. Culm-internodes channelled; 18–22 cm long; smooth; 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; chartaceous; green; concolorous; glabrous; hairy on margins; without auricles; glabrous on shoulders. Culm-sheath ligule 0.5–1 mm high; entire. Culm-sheath blade linear; erect; 0.3–0.5 cm long. Leaves cauline; 1–3 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose; 3–5 mm long; pale. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base cuneate; with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate, or oblong; 18–20 cm long; 12–15 mm wide. Leaf-blade venation with 8–12 secondary veins; with distinct cross veins. Leaf-blade apex caudate.

INFLORESCENCE Synflorescence bractiferous; scanty (2–3 spikelets); with glumaceous subtending bracts; with axillary buds at base of spikelet.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3–4 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 several; 3 empty glumes; persistent; similar; shorter than spikelet. Lower glume lanceolate; 2–4 mm long; membranous; without keels. Lower glume apex acute. Upper glume lanceolate; 4–5 mm long; membranous; without keels. Upper glume apex acute.

FLORETS Fertile lemma lanceolate, or ovate; 7 mm long; chartaceous; without keel; 7–9 -veined. Lemma lateral veins with cross-veins. Lemma apex acuminate. Palea 1 length of lemma. Palea apex emarginate, or obtuse. Apical sterile florets resembling fertile though underdeveloped.

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

FRUIT Caryopsis with fleshy pericarp; oblong, or ovoid; 15 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.