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This species is accepted, and its native range is Artificial hybrid or cultivar.
Cenchrus × cupreus 'Rubrum'

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect; 100-150 cm long. Culm-nodes glabrous. Lateral branches lacking, or sparse. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule a ciliolate membrane; 0.5-0.8 mm long. Leaf-blades 33-52 cm long; 6-11 mm wide; purple. Leaf-blade margins scabrous; ciliate; hairy at base.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle spiciform; linear; nodding; flexuous; 23-32 cm long; 3-5.8 cm wide. Primary panicle branches accrescent to a central axis; with sessile scars on axis. Panicle axis with rounded ribs; pubescent; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile and pedicelled; 1-3 in the cluster. Involucre composed of bristles; 11.7-25 mm long; base obtuse; base 0.5-1.1 mm long. Involucral bristles deciduous with the fertile spikelets; numerous; with an outer whorl of thinner bristles; 45-80 in principal whorl; inner bristles longer than outer; with one conspicuously longer bristle; 21.3-33.6 mm long; terete; flexible; ciliate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5.3-6.5 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; 5.3-6.5 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 0.5-1 mm long; 0.1-0.2 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 1.9-3.6 mm long; 0.5 length of spikelet; membranous; without keels; 0-1 -veined. Upper glume primary vein absent, or distinct. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 4.7-6.1 mm long; 0.9 length of spikelet; chartaceous; 5 -veined; acuminate. Palea of lower sterile floret 4.5-5 mm long. Fertile lemma lanceolate; 5.2-6.1 mm long; chartaceous; without keel. Lemma margins flat. Lemma apex acuminate. Palea 4.7-5.6 mm long; chartaceous; 2 -veined.
Morphology Reproductive morphology Flowers
Anthers 3; 2.5-2.7 mm long.
Distribution
North America: northeast USA and south-central .
Reference
Paniceae. Wipff & Veldcamp 2004.

Introduced into:

California, Florida, Hawaii, Jawa, New Guinea, Texas

Cenchrus × cupreus (Thorpe) Govaerts appears in other Kew resources:

First published in Skvortsovia 4(3): 77 (2018)

Literature

Kew Backbone Distributions

  • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
  • Veldkamp, J.F. (2014). A revision of Cenchrus incl. Pennisetum (Gramineae) in Malesia with some general nomenclatural notes Blumea 59: 59-75.

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 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

Kew Science Photographs
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/