Poaceae
Isachne

Isachne commelinifolia Warb.

First published in Repert. Spec. Nov. Regni Veg. 16: 352 (1920)
This species is accepted
The native range of this species is SE. China to Indo-China, Japan (S. Kyushu) to Taiwan. It is a perennial and grows primarily in the subtropical biome.

Descriptions

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]

Morphology General Habit
Annual, or perennial; short-lived. Stolons present. Culms prostrate; 10-25 cm long; rooting from lower nodes. Culm-nodes pubescent. Leaf-sheaths glabrous on surface, or hispid; outer margin hairy. Ligule a fringe of hairs; 1-2 mm long. Leaf-blades lanceolate; 5-7 cm long; 10-18 mm wide. Leaf-blade surface glabrous, or pilose; sparsely hairy; hairy adaxially. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic, or ovate; 3-5.5 cm long. Primary panicle branches ascending, or spreading. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.1-2.4 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.1-2.4 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 ovate; 1 length of spikelet; membranous; without keels; 7-9 -veined. Lower glume surface hispidulous. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; without keels; 9-11 -veined. Upper glume surface hispidulous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate, or orbicular; coriaceous; without keel. Lemma margins involute; pubescent. Lemma apex obtuse. Palea coriaceous. Palea surface puberulous (upper floret).
Distribution
Asia-temperate: China and eastern Asia.
Reference
Isachneae. Fl China 2007.
[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

  • 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