Poaceae
Chimonobambusa

Chimonobambusa callosa (Munro) Nakai

First published in J. Arnold Arbor. 6: 151 (1925)
This species is accepted
The native range of this species is E. Himalaya to Indo-China. It is a bamboo and grows primarily in the wet tropical biome.

Descriptions

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: not threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial. Rhizomes elongated; leptomorph. Culms erect; 400-700 cm long; 12-25 mm diam.; woody; with root thorns from the nodes. Culm-internodes terete; thin-walled; 12-25 cm long; grey; smooth. Culm-nodes swollen. Lateral branches dendroid. Culm-sheaths 1 length of internode; chartaceous; pubescent; hairy at the base; hairy on margins; truncate at apex; ciliate on shoulders. Culm-sheath ligule 2 mm high; fimbriate. Culm-sheath blade linear; 1.2-2.5 cm long; pubescent. Leaves cauline. Leaf-sheaths pubescent; hairs tawny; outer margin hairy. Leaf-sheath oral hairs setose. Ligule a ciliolate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.7 cm long. Leaf-blades deciduous at the ligule; lanceolate, or oblong; 20-33 cm long; 17-32 mm wide. Leaf-blade midrib conspicuous. Leaf-blade venation with 10-16 secondary veins; with distinct cross veins. Leaf-blade surface scabrous; rough adaxially; pubescent; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate; antrorsely scabrous.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; scanty; lax; with glumaceous subtending bracts; without axillary buds at base of spikelet; without prophylls. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 6-12 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 50-75 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; curved; 5 mm long; eventually visible between lemmas; glabrous.
Fertile
Spikelets comprising 6-12 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 50-75 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; curved; 5 mm long; eventually visible between lemmas; glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes two; persistent; similar; shorter than spikelet. Lower glume oblong; 6-7 mm long; membranous; without keels; 1-3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume oblong; 6-7 mm long; membranous; without keels; 1-3 -veined. Upper glume lateral veins absent, or obscure. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 5-9 mm long; membranous; without keel; 3-7 -veined. Lemma margins ciliolate; hairy above. Lemma apex acute; mucronate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 3; veined; ciliate. Anthers 3. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-tropical: India.
Reference
Bambuseae. Gamble 1995.
[GB]

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