Poaceae
Sporobolus

Sporobolus sciadocladus Ohwi

First published in Bull. Tokyo Sci. Mus. 18: 12 (1947)
This species is accepted
The native range of this species is Maluku to New Guinea. It is an annual and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Annual; caespitose; clumped loosely. Basal innovations intravaginal. Culms erect, or geniculately ascending; 25-50 cm long. Culm-internodes smooth; distally glabrous. Lateral branches sparse. Leaf-sheaths smooth; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs scanty, or lacking. Ligule a fringe of hairs; 0.3 mm long. Leaf-blades 10-20 cm long; 3-6 mm wide. Leaf-blade midrib keeled beneath. Leaf-blade surface scaberulous; rough adaxially; glabrous. Leaf-blade margins glabrous, or ciliate. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; 5-10 cm long; 0.5-1.5 cm wide. Primary panicle branches appressed; 6-10 -nate; whorled at most nodes; 1-2.7 cm long. Panicle axis 7-9 noded; smooth; glabrous. Panicle branches flexuous; glandular. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; reaching apex of florets. Lower glume lanceolate; 1.4-1.7 mm long; 0.5-0.66 length of upper glume; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume surface smooth. Lower glume apex acuminate. Upper glume lanceolate; 2.1-2.4 mm long; 1 length of adjacent fertile lemma; hyaline; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume surface smooth. Upper glume apex acute, or acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 2-2.3 mm long; membranous; without keel; 1 -veined. Lemma apex acute. Palea readily splitting down midline; elliptic; 2-2.1 mm long; 2 -veined. Palea keels approximate. Palea apex emarginate.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.25 mm long. Anthers 3; 0.4-0.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with free soft pericarp; ellipsoid; laterally compressed; 1.5-1.8 mm long. Embryo 0.5 length of caryopsis.
Distribution
Asia-tropical: Malesia.
Reference
Eragrostideae. Baaijens 1997.
[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