Poaceae
Lepturus

Lepturus androyensis A.Camus

First published in Bull. Mus. Natl. Hist. Nat., sér. 2, 29: 275 (1957)
This species is accepted
The native range of this species is S. Central 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. Culms geniculately ascending; 25-35 cm long; rooting from lower nodes. Culm-internodes smooth; distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; keeled; smooth; glabrous on surface. Leaf-sheath auricles erect. Ligule a ciliolate membrane; 0.5-0.7 mm long. Leaf-blade base with a false petiole. Leaf-blades lanceolate; 7-8.5 cm long; 5-7 mm wide. Leaf-blade venation with 4 secondary veins. Leaf-blade surface scaberulous; rough abaxially. Leaf-blade margins scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; smoothly terete; bilateral; 4-6 cm long. Rhachis fragile at the nodes; subcylindrical and excavated; 1-1.5 mm wide; glabrous on surface; glabrous on margins. Spikelet packing adaxial; alternate; regular; 2 -rowed. Rhachis internodes oblong; 3-4 mm long. Rhachis internode tip oblique; flat. Spikelets sunken; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets. Spikelets oblong; dorsally compressed; 4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus oblong; 1 mm long; glabrous.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets. Spikelets oblong; dorsally compressed; 4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus oblong; 1 mm long; glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes one the lower absent or obscure (but terminal spikelet with 2 glumes 7mm long); exceeding apex of florets; firmer than fertile lemma. Upper glume lanceolate; 4 mm long; coriaceous; without keels. Upper glume apex acuminate; awned only on distal spikelets; 1 -awned. Upper glume awn 3.5-4 mm long.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret lanceolate; 3 mm long. Fertile lemma lanceolate; 2.5 mm long; coriaceous; without keel; 3 -veined. Lemma margins ciliolate. Lemma apex acute. Palea 2.6-2.7 mm long.
Distribution
Africa: western Indian ocean.
Reference
Leptureae. 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 2026. 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 2026. 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