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Descriptions

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

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

Dendrocalamus pachystachyus

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; erect at the tip, or inclined at the tip; 1000–1200 cm long; 100 mm diam.; woody; with aerial roots from the nodes. Culm-internodes terete; with small lumen; 39–47 cm long. Lateral branches dendroid. Branch complement many. Culm-sheaths deciduous; coriaceous; glabrous; without auricles. Culm-sheath ligule 3 mm high; dentate. Culm-sheath blade ovate; reflexed; 6–12 cm long; acuminate. Leaves 10–15 per branch. Leaf-sheaths pilose. Ligule an eciliate membrane; 3–5 mm long; erose. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong; 20–40 cm long; 60–120 mm wide. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in stellate clusters; 1.2–3 cm between clusters; pubescent on internodes; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between clusters.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–8 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 17–28 mm long; 5–10 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes two, or several; 2–3 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; chartaceous; without keels. Lower glume apex acute; mucronate. Upper glume ovate; chartaceous; without keels. Upper glume apex acute; mucronate.

FLORETS Fertile florets increasing in size upwards. Fertile lemma ovate; 7.5–12.5 mm long; chartaceous; without keel. Lemma apex acuminate; mucronate. Palea 1 length of lemma; chartaceous; 2-keeled but the uppermost without keels. Palea apex dentate; 2 -fid.

FLOWER Lodicules absent. Anthers 6; 6–7 mm long; yellow. Filaments 7–11 mm long. Stigmas 1.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: China.

NOTES Bambuseae. Hsueh & Li 2002.

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