Poaceae
Eragrostis

Eragrostis viguieri A.Camus

First published in Bull. Soc. Bot. France 102: 347 (1956)
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

Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 30-40 cm long. Leaf-sheaths striately veined; smooth; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule absent. Leaf-blades flat, or involute; 4-6 cm long; 3-4 mm wide. Leaf-blade surface glabrous, or pilose; sparsely hairy. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; 8-10 cm long; 0.8-1 cm wide. Primary panicle branches 1-2 -nate; 1-2.5 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 9-11 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 5-6 mm long; 1.2-1.6 mm wide; breaking up at maturity; rhachilla persistent; shedding paleas. Rhachilla internodes 1.5-1.7 mm long; glabrous.
Fertile
Spikelets comprising 9-11 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 5-6 mm long; 1.2-1.6 mm wide; breaking up at maturity; rhachilla persistent; shedding paleas. Rhachilla internodes 1.5-1.7 mm long; glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; shorter than spikelet. Lower glume lanceolate; 1-1.2 mm long; 0.75 length of upper glume; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 1.5-1.6 mm long; 0.75 length of adjacent fertile lemma; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 1.8-2 mm long; membranous; keeled; 3 -veined. Lemma lateral veins prominent. Lemma apex acute. Palea 1.5 mm long. Apical sterile florets resembling fertile though underdeveloped.
Distribution
Africa: western Indian ocean.
Reference
Eragrostideae. Camus 2007.
[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