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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 calostachyus

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 2000–2500 cm long; woody. Culm-internodes terete; 30–40 cm long; distally pubescent. Lateral branches dendroid. Culm-sheaths pubescent; with appressed hairs; with tawny hairs; truncate at apex. Culm-sheath ligule entire. Leaf-sheaths striately veined; outer margin hairy. Ligule an eciliate membrane; entire, or erose; truncate. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 22–30 cm long; 30–65 mm wide. Leaf-blade venation with 18–26 secondary veins. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; lax; 1.5–5 cm between clusters; 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 4–6 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 10–15 mm long; 5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes several; 2–3 empty glumes; persistent; similar; shorter than spikelet. Upper glume ovate; chartaceous; without keels. Upper glume lateral veins with cross-veins. Upper glume margins ciliate. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 7–8 mm long; chartaceous; without keel. Lemma lateral veins with cross-veins. Lemma surface puberulous. Lemma apex acute. Palea chartaceous; 9 -veined; 2-keeled but the uppermost without keels. Palea keels ciliate.

FLOWER Lodicules absent. Anthers 6; yellow; anther tip apiculate. Filaments united in a tube. Stigmas 1; pubescent. Ovary umbonate; pubescent all over.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India and Indo-China.

NOTES Bambuseae. Gamble 1996.

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