Poaceae
Borinda

Borinda hsuehiana (T.P.Yi) Stapleton

First published in Kew Bull. 53: 456 (1998)
This species is accepted
The native range of this species is China (S. Yunnan). It is a bamboo and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms 300-700 cm long; 10-30 mm diam.; woody. Culm-internodes terete; thick-walled; 18-25 cm long; ridged; distally pubescent. Culm-nodes swollen. Lateral branches dendroid. Branch complement several; in a horizontal line; with subequal branches; thinner than stem. Culm-sheaths persistent; 15-27 cm long; 4-5 times as long as wide; coriaceous; hispid; with dark brown hairs; without auricles; setose on shoulders. Culm-sheath ligule 0.7 mm high. Culm-sheath blade linear, or lanceolate; deciduous; reflexed; 2-4 cm long; 1-2 mm wide. Leaves 4-8 per branch. Leaf-sheaths 2.8-4.2 cm long. Leaf-sheath oral hairs setose; 3-10 mm long. Ligule an eciliate membrane; 1 mm long; truncate, or obtuse. Leaf-blade base cuneate; with a brief petiole-like connection to sheath; petiole 0.15-0.2 cm long; petiole glabrous, or pubescent. Leaf-blades lanceolate; 6-14 cm long; 7-12 mm wide. Leaf-blade venation with 6-8 secondary veins; with obscure cross veins. Leaf-blade surface glabrous, or pubescent; hairy adaxially. Leaf-blade margins serrulate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes; bracteate at pedicel base; subtended by a spatheole; embraced at base by subtending leaf. Racemes 1; single; unilateral; 4.5-7.5 cm long; bearing 5-11 fertile spikelets on each. Rhachis pilose on surface. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2-6 mm long; ciliate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 25-34 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; 2.5-5 mm long; pilose.
Fertile
Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 25-34 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; 2.5-5 mm long; pilose.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume linear, or lanceolate; 0.75 length of upper glume; chartaceous; without keels; 5 -veined. Lower glume apex setaceously attenuate. Upper glume lanceolate; 18-23 mm long; chartaceous; without keels; 7 -veined. Upper glume apex setaceously attenuate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 17-27 mm long; chartaceous; without keel; 9-11 -veined. Lemma lateral veins with cross-veins. Lemma surface pubescent; hairy at base. Lemma margins ciliolate. Lemma apex attenuate. Palea 9-16 mm long; 4 -veined. Palea keels pubescent. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 3; 1.2 mm long; ciliate. Anthers 3; 4.5-6 mm long; yellow. Stigmas 3. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; sulcate on hilar side; 9-10 mm long; dark brown.
Distribution
Asia-temperate: China.
Reference
Bambuseae. Hsueh & L1 1995.
[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

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • 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 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