Poaceae
Dendrocalamus

Dendrocalamus cinctus R.B.Majumdar ex Soderstr. & R.P.Ellis

First published in Smithsonian Contr. Bot. 72: 45 (1988)
This species is accepted
The native range of this species is Sri Lanka. It is a bamboo and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 300-600 cm long; 10-25 mm diam.; woody. Culm-internodes terete; thick-walled; light green, or dark green; smooth, or scaberulous; distally glabrous, or pubescent. Lateral branches dendroid. Bud complement 1. Branch complement many; in a horizontal line; with 1 branch dominant, or 2 branches dominant; thinner than stem. Culm-sheaths deciduous; yellow, or green; pubescent; hairy above; with dark brown hairs; hairy on margins; auriculate. Culm-sheath ligule 1.3 mm high; dentate. Culm-sheath blade lanceolate; demarcated but persistent; reflexed; 15-25 cm long; 10-20 mm wide; acuminate. Leaves 7-8 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath auricles absent, or falcate. Ligule an eciliate membrane; 2 mm long; pubescent on abaxial surface; erose; truncate. Collar with external ligule; ciliate. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate; 18-30 cm long; 15-45 mm wide. Leaf-blade midrib prominent beneath. Leaf-blade venation with distinct cross veins. Leaf-blade surface glabrous. Leaf-blade margins smooth, or scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; clustered at the nodes; in oblong clusters; 1.5 cm long; dense; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between clusters. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 7 mm long; chartaceous; without keels; 13 -veined. Lower glume apex acuminate. Upper glume ovate; 9.4 mm long; chartaceous; without keels; 16 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 11 mm long; chartaceous; without keel; 16 -veined. Lemma lateral veins with cross-veins. Lemma apex acute. Palea chartaceous; 8 -veined; 2-keeled. Palea keels puberulous; adorned above.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 6; 6 mm long; orange. Filaments united in a tube. Stigmas 1-2; pubescent. Ovary umbonate.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-tropical: India.
Reference
Bambuseae. Sod & Ellis 1995.
[GB]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: confident
[AERP]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0