Bambusa rigida Keng & Keng f.

First published in J. Washington Acad. Sci. 36: 81 (1946)
This species is accepted
The native range of this species is China (Sichuan). It is a bamboo and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 500-1000 cm long; 20-50 mm diam.; woody; without nodal roots. Culm-internodes terete; thick-walled; 23-35 cm long; distally pruinose. Lateral branches dendroid; ascending, or spreading. Branch complement several, or many. Culm-sheaths deciduous; 0.5 length of internode; chartaceous; brown; pubescent; with dark brown hairs; truncate at apex, or convex at apex; auriculate; with unequal auricles; with 5-15 mm high auricles; setose on shoulders; shoulders with 10 mm long hairs. Culm-sheath ligule 2-4 mm high; dentate. Culm-sheath blade lanceolate, or triangular; deciduous; erect, or reflexed; glabrous on surface. Leaves 2-12 per branch. Leaf-sheaths 2.5-7 cm long. Leaf-sheath oral hairs scanty; deciduous; 3-9 mm long. Leaf-sheath auricles absent, or erect. Ligule an eciliate membrane; 0.5-1 mm long; truncate. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.5 cm long. Leaf-blades lanceolate, or oblong; 8-24 cm long; 8-27 mm wide. Leaf-blade venation with 8-18 secondary veins; without cross veins. Leaf-blade surface glabrous, or puberulous; hairy abaxially. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
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 3-5 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; compressed; 2-4 mm long; sparsely hairy; hairy at tip.
Fertile
Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; compressed; 2-4 mm long; sparsely hairy; hairy at tip.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes several. Upper glume ovate; 6 mm long; without keels, or 1-keeled.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 10-15 mm long; 4-8 mm wide; mid-green and purple; tipped with last colour; keeled. Lemma apex acute. Palea 7 -veined. Palea keels ciliate; adorned above. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 3; 3 mm long; ciliate. Anthers 6; 4-6 mm long; yellow, or purple; anther tip penicillate. Filaments 8 mm long. Stigmas 3. Ovary umbonate; pubescent on apex.
Distribution
Asia-temperate: China.
Reference
Bambuseae. Keng 1995.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

    • http://creativecommons.org/licenses/by-nc-sa/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