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This species is accepted, and its native range is N. Argentina.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial. Rhizomes elongated. Culms 100-200 cm long. Culm-internodes thick-walled, or solid. Lateral branches ample. Ligule a fringe of hairs. Leaf-blades 14-27 cm long; 5.6-8.6 mm wide. Leaf-blade surface scabrous; rough adaxially; pubescent; hairy abaxially. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle spiciform; linear; 5-6 cm long; 0.7-0.8 cm wide. Primary panicle branches accrescent to a central axis; with sessile scars on axis. Panicle axis with rounded ribs; puberulous; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Involucre composed of bristles; 6 mm long; base truncate. Involucral bristles deciduous with the fertile spikelets; numerous; 12-20 in principal whorl; with longest bristle scarcely emergent; terete; rigid; retrorsely scaberulous; glabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5 mm long; falling entire; deciduous with accessory branch structures.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.5 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 0.9 length of spikelet; membranous; without keels; 7 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret oblong; 1 length of spikelet; membranous; 7 -veined; acute. Fertile lemma lanceolate; 5 mm long; chartaceous; without keel; 5 -veined. Lemma margins flat. Lemma apex acute. Palea 1 length of lemma; chartaceous.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 3. Styles connate below; 0.66 of their length connate.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
South America: southern South America.
Reference
Paniceae. Turpe 1994.

Native to:

Argentina Northeast, Argentina Northwest

Cenchrus rigidus (Griseb.) Morrone appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1982 Cordoba Pennisetum rigidum K000643091 Unknown type material

First published in Ann. Bot. (Oxford) 106: 129 (2010)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

Kew Backbone Distributions

  • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
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 Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0