Poaceae
Borinda

Borinda macclureana (Bor) Stapleton

First published in Edinburgh J. Bot. 51: 290 (1994)
This species is accepted
The native range of this species is SE. Tibet. It is a bamboo and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 500 cm long; 50 mm diam.; woody. Culm-internodes terete; thin-walled; smooth; distally glabrous. Culm-nodes glabrous. Lateral branches dendroid. Leaf-sheaths striately veined; smooth; hirsute. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 5-9 cm long; 5-11 mm wide. Leaf-blade venation with distinct cross veins. Leaf-blade surface pilose; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 20-25 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 20-25 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 9-9.5 mm long; chartaceous; 1-keeled; 5 -veined. Lower glume primary vein scaberulous. Lower glume surface smooth; glabrous. Lower glume apex acuminate. Upper glume elliptic; 12 mm long; chartaceous; 1-keeled; 7 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins with cross-veins. Upper glume surface smooth; glabrous. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 15 mm long; 5 mm wide; chartaceous; without keel; rounded except near apex. Lemma surface puberulous. Lemma margins ciliate; hairy above. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2 mm long overall. Palea elliptic; 9-10 mm long. Palea keels ciliolate. Palea apex acute. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 3; 2 mm long; ciliate. Anthers 3; 5.5 mm long. Stigmas 2; plumose.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; apex unappendaged.
Distribution
Asia-temperate: China.
Reference
Bambuseae. Bor 2002.
[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: low confidence
[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 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