Poaceae
Isachne

Isachne dimyloides Bor

First published in Kew Bull. 4: 96 (1949)
This species is accepted
The native range of this species is Darjiling to Assam. It is a perennial and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Annual. Culms 20 cm long; rooting from lower nodes. Culm-nodes bearded. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule a fringe of hairs. Leaf-blades elliptic; 2-4.5 cm long; 3-7 mm wide. Leaf-blade surface glabrous. Leaf-blade margins cartilaginous; scaberulous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 2.5 cm long; 1.5 cm wide; bearing few spikelets. Spikelets solitary. Fertile spikelets pedicelled. Pedicels eglandular.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; obtuse; 1.8-1.9 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; obtuse; 1.8-1.9 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; 1 length of spikelet; membranous; much thinner on margins; without keels; 9-11 -veined. Lower glume apex cuspidate. Upper glume oblong; 1 length of spikelet; membranous; with hyaline margins; without keels; 9-11 -veined. Upper glume surface pilose; hairy at apex. Upper glume apex cuspidate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic, or orbicular; 1.8 mm long; coriaceous; without keel. Lemma margins involute; ciliolate. Lemma apex obtuse. Palea coriaceous; 2 -veined.
Morphology Reproductive morphology Flowers
Anthers 3; 0.75 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong; 1 mm long.
Distribution
Asia-tropical: India.
Reference
Isachneae. Bor 1994.
[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

  • 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