Poaceae
Sporobolus

Sporobolus hajrae P.Umam. & P.Daniel

First published in Nordic J. Bot. 18: 577 (1998)
This species is accepted
The native range of this species is India (Tamil Nadu). It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Annual; caespitose. Culms 30 cm long. Leaf-sheaths 3.5-6 cm long; glabrous on surface. Ligule a fringe of hairs. Leaf-blades 1.5-7 cm long; 5 mm wide. Leaf-blade margins ciliate; hairy at base.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; 10-15 cm long. Primary panicle branches appressed (but lowest whorl spreading); 7 -nate; whorled at most nodes. Panicle axis with lower internodes 0.5-1 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 1.8-2 mm long; 0.3-0.4 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 1.8-2 mm long; 0.3-0.4 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; dissimilar; shorter than spikelet. Lower glume oblong, or ovate; 0.5-0.8 mm long; 0.4-0.5 length of upper glume; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume oblong, or ovate; 1.3-1.5 mm long; 0.9 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 1.5-1.8 mm long; 0.5-0.7 mm wide; membranous; without keel; 1 -veined. Lemma apex acute. Palea oblong, or ovate; 1.5 mm long. Palea apex emarginate.
Morphology Reproductive morphology Flowers
Anthers 2; 0.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with free soft pericarp; obovoid; 0.7-0.8 mm long; light brown.
Distribution
Asia-tropical: India.
Reference
Eragrostideae. Umamaheswari & Daniel 2006.
[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: 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

  • 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