Poaceae
Sporobolus

Sporobolus mendocinus Méndez

First published in Bol. Soc. Argent. Bot. 30: 13 (1994)
This species is accepted
The native range of this species is W. Argentina. It is a perennial and grows primarily in the temperate 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: low confidence
[AERP]

Morphology General Habit
Perennial; caespitose. Rhizomes short. Culms erect; robust; 50-180 cm long; 2.4-3 mm diam.; 3-5 -noded. Culm-internodes distally glabrous. Leaf-sheaths 11-15 cm long; longer than adjacent culm internode; striately veined; glabrous on surface; outer margin hairy. Ligule a fringe of hairs; 1-2.5 mm long. Leaf-blades flexuous; conduplicate; 60-85 cm long; 2-2.3 mm wide. Leaf-blade margins scabrous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle spiciform; linear; 18-25 cm long; 0.5-1 cm wide. Primary panicle branches 1-2.5 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-1.3 mm long; scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; subterete; 2.5-3.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; subterete; 2.5-3.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; reaching apex of florets. Lower glume lanceolate; 1.5-2 mm long; 0.66 length of upper glume; hyaline; without keels; 0-1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acute. Upper glume lanceolate; 2.5-3 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 2.5-3 mm long; membranous; without keel; 3 -veined. Lemma surface asperulous. Lemma apex acute. Palea readily splitting down midline; 2.4-2.6 mm long; 2 -veined. Palea keels approximate. Palea surface asperulous.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.3-0.4 mm long. Anthers 3; 1-2 mm long; yellow.
Morphology Reproductive morphology Fruits
Caryopsis with free soft pericarp; ellipsoid; laterally compressed; 1.5-1.8 mm long; light brown, or dark brown. Embryo 0.33-0.5 length of caryopsis.
Distribution
South America: southern South America.
Reference
Eragrostideae. Mendez 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