Poaceae
Sporobolus

Sporobolus potosiensis Wipff & S.D.Jones

First published in Sida 16: 165 (1994)
This species is accepted
The native range of this species is NE. Mexico. It is a perennial or rhizomatous geophyte and grows primarily in the desert or dry shrubland 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
Perennial. Rhizomes elongated. Culms erect; 18-51 cm long. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 0.1-0.3 mm long. Collar glabrous. Leaf-blades flat, or conduplicate, or involute; 6.2-24 cm long; 0.6-2.5 mm wide. Leaf-blade surface scaberulous and papillose; rough adaxially. Leaf-blade margins scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 12-18 cm long; 4-9 cm wide. Primary panicle branches 3-8 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.2-2.2 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; subterete; 1.6-2.5 mm long; 0.5-1.1 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; subterete; 1.6-2.5 mm long; 0.5-1.1 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; reaching apex of florets. Lower glume lanceolate; 1-1.5 mm long; 0.75 length of upper glume; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 1.3-2.1 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 1.5-2.3 mm long; membranous; without keel; 1 -veined. Lemma apex acute. Palea readily splitting down midline; 1.6-2.2 mm long; 2 -veined. Palea keels approximate.
Morphology Reproductive morphology Flowers
Anthers 3; 1.2-1.4 mm long; yellow.
Morphology Reproductive morphology Fruits
Caryopsis with free soft pericarp; 0.9-1 mm long.
Distribution
North America: Mexico.
Reference
Eragrostideae. Wipff & Jones 2002.
[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

  • 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