Poaceae
Sporobolus

Sporobolus coarctatus (Trin.) P.M.Peterson & Saarela

First published in Taxon 63: 1236 (2014)
This species is accepted
The native range of this species is SE. & S. Brazil to NE. Argentina. It is a perennial and grows primarily in the subtropical 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: confident
[AERP]

Morphology General Habit
Perennial; caespitose. Rootstock evident. Rhizomes absent, or short. Culms erect; 100-200 cm long. Leaf-sheaths smooth; outer margin glabrous. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 2-3 mm long. Leaf-blades involute; 2-3 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins smooth, or scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes numerous; 10-50; borne along a central axis; closely spaced; in a multilateral false spike; appressed; unilateral; 2-5 cm long; bearing 15-25 fertile spikelets on each. Central inflorescence axis 15-40 cm long; pilose. Rhachis angular; smooth on margins; ciliate on margins; terminating in a spikelet. Spikelet packing broadside to rhachis; regular; 2 -rowed. Spikelets pectinate; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 10-20 mm long; 4-8 mm wide; falling entire.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 10-20 mm long; 4-8 mm wide; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; exceeding apex of florets. Lower glume linear; 6-10 mm long; 0.5-0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein ciliate. Lower glume lateral veins absent. Lower glume surface glabrous, or pilose. Lower glume apex acute. Upper glume lanceolate; 10-20 mm long; 1.5 length of adjacent fertile lemma; scarious; 1-keeled; 1-3 -veined. Upper glume primary vein ciliate. Upper glume surface glabrous, or pilose. Upper glume apex attenuate; muticous, or awned; 1 -awned. Upper glume awn 0-2 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 8-12 mm long; herbaceous; keeled; 3 -veined. Lemma midvein ciliate; hairy above. Lemma margins scaberulous. Lemma apex emarginate. Palea 2 -veined.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 3; 4-7 mm long.
Distribution
South America: Brazil and southern South America.
Reference
Cynodonteae. Mobberley 1993.
[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 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