Poaceae
Isachne

Isachne gracilis C.E.Hubb.

First published in Bull. Misc. Inform. Kew 1927: 77 (1927)
This species is accepted
The native range of this species is India. It is an annual 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
Annual. Culms erect, or geniculately ascending; slender; 5-25 cm long. Culm-nodes glabrous. Ligule an eciliate membrane, or absent. Leaf-blades lanceolate, or elliptic, or oblong; 1-3 cm long; 2-15 mm wide; membranous. Leaf-blade surface hirsute; sparsely hairy.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 1-10 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 0.5-1 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 0.5-1 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; reaching apex of florets; thinner than fertile lemma. Lower glume oblong; 0.2-0.5 mm long; 0.5 length of spikelet; membranous; without keels; 5-7 -veined. Lower glume surface pubescent. Lower glume apex obtuse. Upper glume oblong; 0.5-1 mm long; 1 length of spikelet; membranous; without keels; 7-9 -veined. Upper glume surface pubescent. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile florets with the lowest dissimilar. Lowest fertile lemma oblong; 0.5-1 mm long; 1-2 length of adjacent lemma; thinner than adjacent lemma. Fertile lemma orbicular, or obovate; 0.5 mm long; coriaceous; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined. Palea surface pubescent.
Morphology Reproductive morphology Flowers
Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-tropical: India.
Reference
Isachneae. Nair 1993.
[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

  • 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 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

  • Kew Science Photographs

    • Copyright applied to individual images