Compilation
Hyparrhenia dregeana

36 Images see all

Previous
Next

Name

Identification
Andropogon dregeanus Nees [family POACEAE ] Hyparrhenia dregeana (Nees) Stapf ex Stent [family POACEAE ] (stored under name);
Related name
  • Hyparrhenia elongata
  • Hyparrhenia phyllopoda
  • Andropogon auctus
  • Cymbopogon micratherus
  • Hyparrhenia dregeana
  • Andropogon dregeanus
  • Andropogon dregeana

Flora

Entry for HYPARRHENIA dregeana (Nees) Stent [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
HYPARRHENIA dregeana (Nees) Stent [family POACEAE], in Bothalia 1: 249 (1923). Types: South Africa, Kei [Key] R., Drège (K, isosyn.!) & Umgazana [Omgaziana] R., Drège (whereabouts uncertain) & Omsamculo to Omcomas, Drège (whereabouts uncertain).
Andropogon dregeanus Nees [family POACEAE], Fl. Afr. Austr. 1: 112 (1841)
Andropogon pilosissimus Hack. [family POACEAE], in DC., Monogr. Phan. 6: 690 (1889). Type: South Africa, Natal, Biggasberge, Rehmann 7109 (Z, holo.!)
Andropogon auctus Stapf [family POACEAE], in Fl. Cap. 7: 357 (1898). Type: South Africa, Thaba Nchu, Zeyher 1799 (K, lecto.!)
Hyparrhenia elongata Stapf [family POACEAE], in F.T.A. 9: 343 (1919). Type: Ethiopia, Tigre, Schimper 1006 (K, lecto.!)
Hyparrhenia phyllopoda Stapf [family POACEAE], in F.T.A. 9: 346 (1919). Types: Ethiopia, Mukafilo, Drake-Brockman 151 & 152 (both K, syn.!)
Hyparrhenia aucta (Stapf) Stent [family POACEAE], in Bothalia 1: 249 (1923)
Cymbopogon micratherus Pilg. [family POACEAE], in N.B.G.B. 10: 596 (1929). Type: Kenya, N. Nyeri District, Liki R., Fries 1459 (UPS, holo.!)
Hyparrhenia subaristata Peter [family POACEAE], F.D.O.-A. 1, Anh.: 120, fig. 77 (1936). Type: Tanzania, Kondoa District, Bereku [Beréu], Peter 44224 (B, holo.†)
Hyparrhenia brachychaete Peter [family POACEAE], F.D.O.-A. 1, Anh.: 121, fig 78/1 (1936). Types: Tanzania, Masai District, Ussare R., Peter 43307 & 43327 (both B, syn.†)
Hyparrhenia micrathera (Pilg.) Peter [family POACEAE], F.D.O.-A. 1: 379 (1936); G.T.: 108 (1965)
Hyparrhenia pilosissima (Hack.) J.G. Anders. [family POACEAE], in Bothalia 9: 130 (1966)
Information
Densely tufted perennial, the basal leaf-sheaths silky pubescent below; culms robust, 1.5–2 m. high or more, Leaf-blades mostly up to 60 cm. long, 3–8 mm. wide, usually harsh and glaucous but sometimes soft and green. False panicle narrow, fairly dense, 20–50 cm. long; spatheoles narrowly lanceolate, 2.5–5 cm. long, becoming reddish-brown, the peduncles from 1/2 to rather longer than the spatheole; racemes 10–25-awned per pair, densely spiculate with internodes 1.5–2 mm. long, tardily deflexed; raceme-bases subequal, the upper 1–1.5 mm. long, flattened, stiffly bearded, usually with a scarious lobe up to 0.5 mm. long at its tip. Homogamous pairs 1 at the base of the lower raceme only. Sessile spikelet 4–5.5 mm. long, densely villous to hispidulous, rarely glabrous; callus cuneate, 1 mm. long, subacute to narrowly obtuse; awn (1–)8–20(–28) mm. long. Pedicelled spikelet densely villous to hispidulous, rarely glabrous, muticous or sometimes with a brief awn-point.
Range
DISTR. U1; K1–6; T2, 4, 5, 7 Ethiopia and Sudan to South Africa
Altitude range
2000–2600 m.
Distribution
KENYA Nakuru District Nakuru, 22 Sept. 1929, Hitchcock 25116! & Elburgon–Turi, 17 June 1948, Bogdan 1663! & near Eburru, 21 Jan. 1959, Bogdan 4764!TANZANIA Masai District Ngorongoro Crater, 15 Feb. 1959, Heady 1343!TANZANIA Ufipa District Mt. Kito, 20 Nov. 1958, Vesey-FitzGerald 1987!TANZANIA Njombe District 32 km. NW. of Njombe, 19 May 1957, Strang 10!UGANDA Karamoja District Mt. Moroto, Jan. 1959, J. Wilson 641!
Notes
H. dregeana may usually be recognized from its racemes with their numerous, rather densely packed spikelets and short awns, but there is a good deal of variation within the species, particularly with regard to spikelet-indumentum and leaf-texture. The pubescent basal sheaths appear to provide a reliable diagnostic character, but it should be appreciated that the basal parts of some allied species are poorly represented in herbarium collections. Other useful, but inconstant, characters are a tendency to fairly long peduncles, the muticous pedicelled spikelets, and the scarious frill (scarcely amounting to an appendage) at the tip of the raceme-base.Species 18–23 with glabrous pedicelled spikelets have no exact counterpart among those (24–29) having villous spikelets, and the indumentum is taken to be a character of diagnostic significance. H. dregeana is an exception to this rule, the range of variation in glabrous and villous forms being apparently identical.

Related Materials