Poaceae
Isachne

Isachne vitiensis Rendle

First published in J. Linn. Soc., Bot. 39: 181 (1909)
This species is accepted
The native range of this species is Vanuatu, Fiji. It is a perennial and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial. Culms decumbent; 30-105 cm long; rooting from lower nodes. Ligule a fringe of hairs. Leaf-blades lanceolate; 5-20 cm long; 6-19 mm wide; stiff.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 5-25 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1.3-1.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 1.3-1.5 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 ovate; 0.8 length of upper glume; 0.66 length of spikelet; membranous; without keels. Lower glume apex acute. Upper glume ovate; 0.75 length of spikelet; membranous; without keels. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma obovate; 1-1.3 mm long; coriaceous; without keel. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.
Morphology Reproductive morphology Flowers
Anthers 3.
Distribution
Pacific: southwestern.
Reference
Isachneae. Parham 1993.
[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: not 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