Poaceae
Isachne

Isachne guineensis Stapf & C.E.Hubb.

First published in Bull. Misc. Inform. Kew 1933: 302 (1933)
This species is accepted
The native range of this species is Guinea. It is a perennial and grows primarily in the wet tropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/116125532/116125546

Conservation
EN - endangered
[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]

Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit
Culms ascending, rooting at the lower nodes.
[FWTA]

Morphology General Habit
Perennial. Culms geniculately ascending; 15-30 cm long; rooting from lower nodes. Ligule a fringe of hairs. Leaf-blades linear; 6-12 cm long; 5-10 mm wide. Leaf-blade surface smooth; glabrous. Leaf-blade margins cartilaginous; scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 2.5-7.5 cm long; contracted about primary branches. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; unequal; 2-8 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets, or 0 basal sterile florets; 1 fertile florets, or 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite.
Fertile
Spikelets comprising 1 basal sterile florets, or 0 basal sterile florets; 1 fertile florets, or 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume elliptic; 1.9 mm long; 1 length of upper glume; 0.9 length of spikelet; membranous; without keels; 5-7 -veined. Lower glume apex obtuse. Upper glume elliptic; 1.9 mm long; membranous; without keels; 5-7 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea; separately deciduous. Lemma of lower sterile floret elliptic; 1.7 length of fertile lemma; 1 length of spikelet; membranous; glabrous. Fertile florets female; with the lowest dissimilar (bisexual, or male when see above). Lowest fertile lemma elliptic; 1.7 length of adjacent lemma; thinner than adjacent lemma; glabrous. Fertile lemma ovate; 2 mm long; coriaceous; without keel; 5-7 -veined. Lemma lateral veins obscure. Lemma surface puberulous. Lemma margins involute. Lemma apex obtuse. Palea coriaceous; 2 -veined.
Morphology Reproductive morphology Flowers
Anthers 3; 1 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Africa: west tropical.
Reference
Isachneae. FTA.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora of West Tropical Africa

    • Flora of West Tropical Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • 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/

  • 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 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