Chimonobambusa pachystachys Hsueh f. & T.P.Yi

First published in J. Yunnan Forest. Coll. 1982(1): 33 (1982)
This species is accepted
The native range of this species is China (Sichuan, Yunnan). It is a bamboo and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Perennial. Rhizomes elongated; leptomorph. Culms erect; 300-600 cm long; 10-30 mm diam.; woody; with root thorns from the nodes. Culm-internodes quadrangular; thick-walled; 15-22 cm long; smooth; distally hispid. Culm-nodes swollen; pubescent. Lateral branches dendroid. Branch complement three; in a horizontal line; with subequal branches; thinner than stem. Culm-sheaths tardily deciduous; chartaceous; green and white; distinctly mottled with last colour; hispid; with tawny hairs; without auricles; glabrous on shoulders. Culm-sheath ligule entire. Culm-sheath blade linear; demarcated but persistent; erect; 0.3-0.4 cm long. Leaves cauline; 1-3 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane; truncate. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades deciduous at the ligule; lanceolate; 10-18 cm long; 11-21 mm wide. Leaf-blade venation with 8-12 secondary veins; with distinct cross veins. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; paniculate; with glumaceous subtending bracts; with axillary buds at base of spikelet. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes several; 3 empty glumes; persistent; similar; shorter than spikelet. Lower glume lanceolate; membranous; without keels. Lower glume apex acute. Upper glume lanceolate; membranous; without keels. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; chartaceous; without keel; 5-7 -veined. Lemma lateral veins with cross-veins. Lemma surface glabrous, or puberulous. Lemma apex apiculate. Palea 1 length of lemma. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 3; membranous; ciliate. Anthers 3. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with fleshy pericarp; oblong. Endosperm evanescent.
Distribution
Asia-temperate: China.
Reference
Bambuseae. Wen 1996.
[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
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. 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 2025. 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