Poaceae
Bambusa

Bambusa macrolemma Holttum

First published in Kew Bull. 21: 274 (1967)
This species is accepted
The native range of this species is Bismarck Archipelago (New Britain). It is a bamboo and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms 20 mm diam.; woody; without nodal roots. Culm-internodes terete; thin-walled. Lateral branches dendroid. Branch complement one. Leaves cauline. Leaf-sheath oral hairs lacking, or ciliate; 5 mm long. Leaf-sheath auricles falcate. Ligule a ciliate membrane. Collar with external ligule. Leaf-blade base truncate, or broadly rounded; with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 25-33 cm long; 40-50 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; clustered at the nodes; in untidy tufts; 2-4 cm between clusters; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; subterete; 15-23 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 4 mm long.
Fertile
Spikelets comprising 5 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; subterete; 15-23 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 4 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume margins ciliate. Upper glume margins ciliate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 12 mm long; without keel. Lemma margins ciliate; hairy above. Lemma apex attenuate. Palea keels eciliate.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 6; 5.5 mm long. Stigmas 3. Ovary umbonate; pubescent on apex.
Distribution
Asia-tropical: Papuasia.
Reference
Bambuseae. Holttum 1996.
[GB]

Sources

  • 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 2023. 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 2023. 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