Brachypodium humbertianum A.Camus

First published in Bull. Soc. Bot. France 102: 121 (1955)
This species is accepted
The native range of this species is Madagascar. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

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]

Morphology General Habit
Perennial; caespitose. Culms erect; 30-40 cm long. Culm-nodes glabrous. Leaf-sheaths striately veined; pilose. Ligule an eciliate membrane; 1.5 mm long. Leaf-blades 11-15 cm long; 3-4 mm wide. Leaf-blade surface pilose; hairy abaxially. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; bilateral; bearing few fertile spikelets; bearing 3 fertile spikelets on each. Spikelet packing broadside to rhachis; lax. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 30 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 30 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; 4.8-5 mm long; 0.66 length of upper glume; membranous; without keels; 5 -veined. Lower glume apex acute. Upper glume lanceolate; 8 mm long; 0.5 length of adjacent fertile lemma; membranous; without keels; 7 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 14 mm long; membranous; without keel; 7 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn apical; 7 mm long overall. Apical sterile florets resembling fertile though underdeveloped.
Distribution
Africa: western Indian ocean.
Reference
Brachypodieae. Camus 2007.
[GB]

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