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This species is accepted, and its native range is Ethiopia to E. Tropical Africa.
A specimen from Kew's Herbarium

[FTEA]

Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit
Perennial, with long stout rhizomes and stolons forming a mat; culms 15–45 cm. high, somewhat spongy, ascending from a creeping base.
Morphology Leaves
Leaf-blades linear, 7–35 cm. long, 3–10 mm. wide, flat or folded.
Morphology Reproductive morphology Inflorescences
Panicle linear, 4–10 cm. long, often enclosed below by the uppermost sheath, rhachis with shallow angular ribs below the flat stumpless scars, scaberulous; involucre enclosing 1–3 sessile or shortly pedicelled (up to 0.5 mm.) spikelets, with or without an indistinct oblong stipe up to 0.5 mm.; bristles glabrous, the longest 6–15 mm.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets narrowly lanceolate, 6–12 mm. long, acute to acuminate; lower glume minute or suppressed; upper glume up to 1.5 mm. long; lower lemma 1/3–2/3 as long as the spikelet, barren; upper lemma as long as the spikelet, membranous.
Habitat
In swamps; 1800–2700 m.
Distribution
K3 K4 T2

[GB]
Morphology General Habit
Perennial; mat forming. Rhizomes elongated. Stolons present. Culms decumbent; 10-150 cm long. Ligule a fringe of hairs. Leaf-blades flat, or conduplicate; 4-30 cm long; 2-10 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; embraced at base by subtending leaf. Panicle spiciform; linear; 2-15 cm long. Primary panicle branches accrescent to a central axis; with sessile scars on axis. Panicle axis angular; scaberulous; glabrous; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile; 1-2 in the cluster. Involucre composed of bristles; oblong; 3-6 mm long; base obtuse. Involucral bristles deciduous with the fertile spikelets; numerous; with one conspicuously longer bristle; 7-15 mm long; terete; flexible; glabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute, or acuminate; 6-10 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; acute, or acuminate; 6-10 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 oblate; 0.05 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex truncate. Upper glume ovate; 0.25-0.33 length of spikelet; hyaline; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse, or acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret ovate; 0.8-1 length of spikelet; membranous; 5-7 -veined; acute. Fertile lemma ovate; 6-10 mm long; membranous; without keel; 5-7 -veined. Lemma margins flat. Lemma apex acute. Palea membranous.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 3; 3 mm long; anther tip smooth. Styles connate below.
Distribution
Africa: northeast tropical and east tropical.
Reference
Paniceae. FTEA.

[FTEA]

Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit
Perennial, with long stout stolons and rhizomes forming a low matted sward, or with tall ascending culms; culms 10–150 cm. high, ascending from a creeping base.
Morphology Leaves
Leaf-blades linear, 4–30 cm. long, 2–10 mm. wide, flat or folded.
Morphology Reproductive morphology Inflorescences
Panicle linear, 2–15 cm. long, often enclosed below by the uppermost sheath; rhachis with shallow angular ribs below the flat stumpless scars, scaberulous; involucre enclosing 1–2 subsessile spikelets, without a distinct stipe; bristles glabrous, the longest 7–15 mm.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets narrowly lanceolate, 6–10 mm. long, acute to acuminate; lower glume minute, up to 0.5 mm., upper glume 1/4–1/3 the length of the spikelet; lower lemma from 4/5 to as long as the spikelet, ♂ or barren, the upper similar in texture.
Habitat
In swamps; also semi-cultivated around habitations, being gathered and burnt to yield salt from the ashes; 1400–2600 m.
Distribution
K3 K4 T2 T7 U3

Native to:

Ethiopia, Kenya, Tanzania, Uganda

Introduced into:

Burundi

Cenchrus riparius (Hochst. ex A.Rich.) Morrone appears in other Kew resources:

Date Reference Identified As Barcode Type Status
May 1, 1976 Bogdan, A. [AB4179], Kenya Pennisetum riparium K000489778
Mar 1, 1976 Edwards, D.C. [1680], Kenya Pennisetum riparium K000489770
Mar 1, 1976 Edwards, D.C. [1680], Kenya Pennisetum riparium K000489781
Schimper [84], Ethiopia Pennisetum riparium K000281190 isotype
Schimper [84], Ethiopia Pennisetum riparium K000281189 isotype
Schimper [84], Ethiopia Pennisetum riparium K000281188 isotype
Battiscombe, E. [507], Kenya Pennisetum riparium K000281209 holotype
Dowson, W.J. [562], Kenya Pennisetum riparium K000281210 holotype
Snowden, J.D. [1227], Uganda Pennisetum riparium K000281211 holotype
Snowden, J.D. [1227], Uganda Pennisetum riparium K000281212 holotype
Snowden, J.D. [1227], Uganda Pennisetum riparium K000281213 holotype
Edwards, D.C. [1477], Kenya Pennisetum riparium K000489785
Bogdan, A. [AB5362], Kenya Pennisetum riparium K000489784
Bogdan, A. [AB3454], Kenya Pennisetum riparium K000489768
Bogdan, A. [2790], Kenya Pennisetum riparium K000489772
Bogdan, A. [AB3235], Kenya Pennisetum riparium K000489774
Bogdan, A. [AB4110], Kenya Pennisetum riparium K000489780
Edwards, D.C. [1648], Kenya Pennisetum riparium K000489769
Kahurananga, J. [2868], Kenya Pennisetum riparium K000489773
Kabuye, C.H.S. [101], Kenya Pennisetum riparium K000489771
Linton, A. [171], Kenya Pennisetum riparium K000489775
Bogdan, A. [AB3220], Kenya Pennisetum riparium K000489776
Bogdan, A. [AB4456], Kenya Pennisetum riparium K000489777
Bogdan, A. [AB2792], Kenya Pennisetum riparium K000489782

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

  • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.
  • Hedberg, I. & Edwards, S. (eds.) (1995). Flora of Ethiopia and Eritrea 7: 1-430. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Ndabaneze, P. (1989). Catalogue des Graminées du Burundi Lejeunia; Revue de Botanique, n.s., 132: 1-127.

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

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