Compilation
Ctenium schweinfurthii

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Name

Identification
Ctenium schweinfurthii Pilg. [family GRAMINEAE ] (stored under name); Verified by Longhi-Wagner, H.M.,
Related name
  • Ctenium elegans
  • Ctenium newtonii
  • Ctenium schweinfurthii

Flora

Entry for CTENIUM newtonii Hack. [family POACEAE]
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, Part (Part 2), page 177, (1974) Author: W. D. CLAYTON, S. M. PHILLIPS AND S. A. RENVOIZE
Names
CTENIUM newtonii Hack. [family POACEAE], in Bol. Soc. Brot. 5: 229 (1887); Clayton in F.W.T.A., ed. 2, 3: 398 (1972). Type: Dahomey, Zumbodji, Newton 7 (K, iso.!)
CTENIUM schweinfurthii Pilg. [family POACEAE], in N.B.G.B. 9: 116 (1924); F.P.S. 3: 421(1956). Type: Sudan, Bahr el Ghazal, Jur [Gir], Schweinfurth 2248 (K, iso.!)
Information
Tufted wiry perennial, the base not markedly fibrous or chaffy; culms up to 1 m. high. Leaf-blades 5–25 cm. long, up to 4 mm. wide, tightly involute, rarely expanded. Spike solitary, (5–)7–20(–30) cm. long, almost straight or coiled in a lax corkscrew spiral, puberulous or shortly pubescent at the summit of the peduncle. Upper glume 4–7 mm. long, glabrous except for the scabrid keel; lowest lemma oblong-elliptic, 1.5–2 mm. long, ciliate on marginal nerves and keel, glabrous or very rarely sparsely pubescent between them, usually obtuse, dorsally awned; second lemma narrowly ovate, 2–2.5 mm. long, ciliate on marginal nerves and sometimes also on the keel, otherwise glabrous or rarely sparsely pubescent, produced into an oblong tongue above the subterminal insertion of the awn; fertile lemma ovate, 2–4 mm. long, ciliate on the marginal nerves, awned from the minutely bidentate tip with an awn 2.5–3 mm. long.
Range
DISTR. U1, 3 throughout western Africa from Senegal to Angola, extending eastwards to the Sudan
Altitude range
± 1000 m.
Distribution
UGANDA Acholi District Murchison Falls National Park, Lolim, 9 Oct. 1957, Buechner 120! & Pakuba, 11 Oct. 1957, Buechner 129!UGANDA Teso District Soroti, 17 Sept. 1946, A. S. Thomas 4547 !
Notes
C. newtonii is a W. African species with a considerable range of variation. It tends to intergrade with C. somalense, and marginal specimens, such as those in East Africa, are not easy to separate. They are best recognized by the absence of a beard at the base of the spike.

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