Bambusa polymorpha Munro

First published in Trans. Linn. Soc. London 26: 98 (1868)
This species is accepted
The native range of this species is Bangladesh to China (Yunnan) and Indo-China. It is a bamboo and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 1500-2500 cm long; 75-150 mm diam.; woody; with aerial roots from the nodes. Culm-internodes terete; 40-60 cm long; grey; distally pruinose. Culm-nodes swollen. Lateral branches dendroid. Culm-sheaths 15-18 cm long; 0.5 times as long as wide; pubescent; with appressed hairs; with white hairs; truncate at apex; auriculate; setose on shoulders. Culm-sheath blade triangular; cordate; 7.5 cm long; pubescent. Leaves cauline. Leaf-sheaths keeled; striately veined; pubescent. Leaf-sheath oral hairs scanty; deciduous. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.1 cm long. Leaf-blades persistent, or deciduous at the ligule; lanceolate; 7-17 cm long; 7-12 mm wide. Leaf-blade venation with 8-12 secondary veins. Leaf-blade surface scaberulous; rough adaxially; pubescent; hairy on both sides. Leaf-blade margins scaberulous. Leaf-blade apex acuminate; antrorsely scabrous.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; subterete; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; flattened; glabrous.
Fertile
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; subterete; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; flattened; glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes several; 1-3 empty glumes. Upper glume ovate. Upper glume mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 5-6 mm long; without keel. Lemma apex acute; mucronate. Palea keels eciliate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 3; membranous; veined; ciliate. Anthers 6; purple; anther tip smooth, or apiculate. Stigmas 3; pubescent. Ovary umbonate; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ovoid; 5 mm long; hairy at apex.
Distribution
Asia-temperate: China. Asia-tropical: India and Indo-China. Pacific: northwestern.
Reference
Bambuseae. Gamble 1995.
[GB]

Sources

  • 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 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 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 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0