Poaceae
Oropetium

Oropetium villosulum Stapf ex Bor

First published in Kew Bull. 4: 571 (1949 publ. 1950)
This species is accepted
The native range of this species is India. It is an annual and grows primarily in the seasonally dry tropical 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: threatened. Confidence: confident
[AERP]

Morphology General Habit
Annual; caespitose. Culms erect; 1-5 cm long. Culm-nodes glabrous. Ligule a ciliolate membrane. Leaf-blades involute; 1-3 cm long; 0.5 mm wide; stiff. Leaf-blade surface pubescent; hairy on both sides. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes; deciduous as a whole; embraced at base by subtending leaf. Racemes 1; single; smoothly terete; bilateral; 1.5 cm long. Rhachis tough; subcylindrical and excavated. Spikelet packing adaxial; regular; 2 -rowed. Spikelets sunken; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes two, or one the lower absent or obscure; deciduous; dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume orbicular; 0-1 mm long; 0-0.5 length of upper glume; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume elliptic; 2 mm long; 1.3 length of adjacent fertile lemma; coriaceous; with hyaline margins; without keels; 3 -veined. Upper glume lateral veins ribbed. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 1.5 mm long; membranous; without keel; 3 -veined. Lemma surface pilose; hairy above. Lemma apex truncate. Palea 1 length of lemma; hyaline; 2 -veined. Palea surface pilose.
Morphology Reproductive morphology Flowers
Anthers 3; 0.33 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with tardily free pericarp.
Distribution
Asia-tropical: India.
Reference
Eragrostideae. Bor.
[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

    • '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 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