Poaceae
Isachne

Isachne bicolor Naik & Patunkar

First published in Bull. Bot. Surv. India 15: 157 (1976)
This species is accepted
The native range of this species is India (Maharashtra, Bihar). It is an annual or perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/177162/7380722

Conservation
VU - vulnerable
[IUCN]

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 decumbent; 30-45 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous, or pubescent. Leaf-sheaths glabrous on surface, or pilose; outer margin hairy. Ligule absent. Leaf-blades lanceolate; 3.5-4.5 cm long; 3-7 mm wide. Leaf-blade venation distinct; with 22-30 secondary veins. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins cartilaginous; smooth, or scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 2-5 cm long. Primary panicle branches ascending; 1 -nate; 1-1.5 cm long. Panicle branches glandular. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; glandular.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.75-3.25 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.75-3.25 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume orbicular; 2.5-3 mm long; 0.9 length of spikelet; membranous; without keels; 5-9 -veined. Lower glume surface glabrous, or pilose; with tubercle-based hairs. Lower glume apex acute. Upper glume orbicular; 2.5-3 mm long; 0.9 length of spikelet; membranous; without keels; 5-9 -veined. Upper glume surface glabrous, or pilose; with tubercle-based hairs. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 2.25-2.5 mm long; coriaceous; without keel. Lemma surface pubescent. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.
Morphology Reproductive morphology Flowers
Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-tropical: India.
Reference
Isachneae. Naik & Pat. 2005.
[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

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • 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