Compilation
Andropogon purpureo-sericeus

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Name

Identification
Isotype of Andropogon purpureo-sericeus Hochst. ex A. Rich. [family GRAMINEAE ] (stored under name); Verified by Baldini R. M., 1995
Related name
  • Sorghum purpureo-sericeum
  • Andropogon purpureo-sericeus
  • Andropogon purpureosericeus
  • Sorghum purpureosericeum

Flora

Entry for Sorghum purpureo-sericeum (A. Rich.) Aschers. & Schweinf. [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, page 451, (1982) Author: W. D. CLAYTON and S.A. RENVOIZE
Names
Sorghum purpureo-sericeum (A. Rich.) Aschers. & Schweinf. [family POACEAE], in Schweinf., Beitr. Fl. Aeth.: 302, 310 (1867); F.T.A. 9: 139 (1917); Ann. list grasses Ug.: 44 (1947); F.P.S. 3: 543 (1956); R.K.G.: 55 (1958); I.G.U.: 55 (1960); G.T.: 96 (1965); Clayton in F.W.T.A., ed. 2, 3: 467 (1972). Types: Ethiopia, Mareb R., Quartin Dillon & Petit & Mt. Walcha, Schimper 1551 (both K, isosyn.!)
Andropogon purpureo-sericeus A. Rich. [family POACEAE], Tent. Fl. Abyss. 2: 469 (1851)
Andropogon purpureo-sericeus Hack. var. calomelas [family POACEAE], in DC, Monogr. Phan. 6: 525 (1889). Type: Ethiopia, Schimper 1417 (K, iso.!)
Andropogon purpureo-sericeus Hack. var. pallidior [family POACEAE], in DC, Monogr. Phan. 6: 525 (1889). Type: Ethiopia, Matamma, Schweinfurth 1033 (K, iso.!)
Sorghum dimidiatum Stapf [family POACEAE], in F.T.A. 9: 140 (1917); Hubbard in Hook., Ic. Pl. 33, t. 3234 (1933). Type: Sudan, without precise locality, Broun (K, holo.!)
Andropogon pappii Gand. [family POACEAE], in Bull. Soc. Bot. Fr. 66: 298 (1920). Type: Ethiopia, Eritrea, Medri-od-Tesfa, Pappi 6735 (LY, holo.!)
Sorghum purpureo-sericeum Garber subsp. deccanense [family POACEAE], in Univ. Calif. Publ. Bot. 23: 328 (1950). Type: cultivated in California, seed from Poona, India, Garber P.7100 (UC, holo.)
Sorghum purpureo-sericeum (Stapf) Garber subsp. dimidiatum [family POACEAE], in Univ. Calif. Publ. Bot. 23: 328 (1950)
Sorghum deccanense Bor [family POACEAE], Grasses Burma, Ceylon, India & Pakistan: 245 (1960). Types: India, Madhya Pradesh, Duthie 8538 & 10025 (both K, syn.!) & Deccan, Woodrow (K, syn.!)
Information
Annual; culms 30–150 cm. high, the nodes bearded. Leaf-blades 10–50 cm. long, 2–10 mm. wide. Panicle narrowly oblong, 5–35 cm. long; primary branches whorled, simple (rarely the longer branched), bearing racemes of 3–5 spikelet pairs. Sessile spikelet lanceolate, 7.5–10 mm. long; lower glume coriaceous, glossy, reddish brown to black, glabrous or sometimes densely villous, bearded from the callus with white to rufous hairs; awn 20–40 mm. long. Pedicelled spikelet linear to lanceolate, 6–10 mm. long, greenish.
Range
DISTR. U1; K1, 4, 7; T1, 2, 4 Nigeria to Ethiopia
Altitude range
500–1500 m.
Distribution
KENYA Northern Frontier Province 40 km. S. of Marsabit, 25 Mar. 1959, Bogdan 4790!KENYA Nairobi District 32 km. E. of Nairobi, 16 July 1951, Bogdan 3136!KENYA Teita District Taveta [Tamta] Estates, 16 May 1934, Sampson 100!TANZANIA Masai District 16 km. E. of Lake Manyara on Arusha road, 23 Feb. 1933, Greenway 3370!TANZANIA Mpanda District Tumba, 15 Feb. 1945, Michelmore 1575!TANZANIA Ufipa District near Muse, 19 Mar. 1959, McCallum Webster T.166!UGANDA Karamoja District Moroto, 22 Oct. 1955, Langdale-Brown 1561! & 12 Sept. 1956, Hardy & Bally 10784! & Namalu R., 3 July 1957, Dyson-Hudson 282!
Distribution (external)
India
Notes
Sorghum purpureo-sericeum and S. versicolor are very closely related. Justification for recognizing them as distinct species rests upon the bimodal frequency curve of their spikelet lengths, their refusal to hybridise (Garber in Univ. California Publ. Bot. 23: 317 (1950)), and their differing geographical distributions. S. dimidiatum is a curiosity from the Sudan with the lower glume sharply constricted across the middle, dividing it into a brown oblong lower portion and a pallid triangular upper portion. It is freely interfertile with S. purpureo-sericeum, as also is S. deccanense, an Indian variant with exceptionally hairy spikelets (Garber, op. cit.: 328).

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