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 an annual and grows primarily in the subtropical 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

    • 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 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