Poaceae
Isachne

Isachne muscicola A.Camus

First published in Bull. Soc. Bot. France 94: 41 (1947)
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. Culms geniculately ascending, or decumbent, or leaning; 100-200 cm long; rooting from lower nodes. Culm-internodes distally glabrous, or pubescent. Lateral branches ample. Ligule a fringe of hairs; 4-5 mm long. Leaf-blades linear; 10-20 cm long; 5-12 mm wide. Leaf-blade surface glabrous. Leaf-blade margins glabrous, or ciliate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; effuse; 15-25 cm long; 10-20 cm wide. Primary panicle branches ascending, or spreading; 1-2 -nate. Panicle branches capillary. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular, or obovate; dorsally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.
Fertile
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular, or obovate; dorsally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 2-2.5 mm long; 1 length of upper glume; 1 length of spikelet; membranous; without keels; 5-9 -veined. Lower glume surface glabrous. Lower glume apex obtuse. Upper glume elliptic; 2-2.5 mm long; 1 length of spikelet; membranous; without keels; 5-9 -veined. Upper glume surface glabrous. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile florets all alike. Fertile lemma orbicular; hemispherical; 2-2.5 mm long; coriaceous; without keel; 5-7 -veined. Lemma lateral veins obscure. Lemma surface glabrous. Lemma margins involute; interlocking with palea keels. Lemma apex obtuse. Palea coriaceous; 2 -veined.
Morphology Reproductive morphology Flowers
Lodicules 2; cuneate; fleshy. Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Africa: western Indian ocean.
Reference
Isachneae. Gr Madag 1997.
[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