Poaceae - Arundinoideae - Arundineae - Chaetobromus Nees
Description:
Perennial, tufted to mat-forming, sometimes stoloniferous or rooting from lower nodes
Leaf blade linear to linear-lanceolate, flat or folded; ligule a fringe of hairs
Inflorescence a panicle, open to contracted, sometimes with only a few spikelets; spikelets solitary, pedicelled, pedicel articulated some distance below spikelet, long-hairy at articulation
Spikelet 9-18 mm long, laterally compressed, falling with glumes and disarticulating between florets; glumes ± equal, as long as to longer than spikelet, keeled, membranous, pubescent, scabrid especially on nerves, awnless; lower glume 5-11-nerved; upper glume narrower, prominently and closely 3-5-nerved
Florets 2-4; lower floret bisexual; upper floret reduced; lemmas decreasing in size upwards, lowest lemma 2.5-5.8 mm long, membranous, 7-9-nerved, glabrous or loosely hairy, 2-lobed, lobes with slender, usually long awns or lower lemma awnless, central awn arising between lobes, awn twisted in lower part, geniculate or straight; callus pungent, hairy; palea obscurely 2-nerved, hyaline
Lodicules 2, fleshy, cuneate, glabrous
Stamens 3
Ovary glabrous; styles plumose above
Caryopsis lorate, pale brown or yellow, surface smooth, dull
x = 6
Nomenclature:
Chaetobromus Nees
Nees ab Esenbeck: 449 (1836)
Stapf: 537 (1899)
Chippindall: 272 (1955)
Clayton & Renvoize: 173 (1986)
Gibbs Russell et al.: 81 (1990)
Watson & Dallwitz: 219 (1994)
Verboom & Linder: 57 (1998)
Distribution & Notes:
Southern Africa: Species 1, S Namibia, Northern and Western Cape
References:
CHIPPINDALL, L.K.A. 1955. A guide to the identification of grasses in South Africa. In D. Meredith, The grasses and pastures of South Africa. Central News Agency, Cape Town
CLAYTON, W.D. & RENVOIZE S.A. 1986. Genera graminum. Grasses of the world. Kew Bulletin. Additional series 13
GIBBS RUSSELL, G.E., WATSON, L., KOEKEMOER, M., SMOOK, L., BARKER, N.P., ANDERSON, H.M. & DALLWITZ. M.J. 1990. Grasses of southern Africa. Memoirs of the Botanical Survey of South Africa No. 58
NEES AB ESENBECK, C.G.D. 1836 In J. Lindley, A natural system of botany. Gramineae, edn 2. Longmans et al., London
STAPF, O. 1898-1900. Gramineae. Flora capensis 7
VERBOOM, G.A. & LINDER, H.P. 1998. A re-evaluation of species limits in Chaetobromus (Danthonieae: Poaceae). Nordic Journal of Botany 18
WATSON, L. & DALLWITZ, M.J. 1994. The grass genera of the world, revised edn. CAB International, Oxon
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