Poaceae
-
Arundinoideae
-
Aristideae
-
Stipagrostis
Nees
Description
:
Perennial (sometimes short-lived) or annual, densely tufted, sometimes shrubs or dwarf shrubs, erect to geniculate, often with a well developed knotty rhizomatous base
Leaf blade
usually long and narrow; ligule a dense fringe of hairs
Inflorescence
a narrow or open panicle, sometimes spike-like, often interrupted; spikelets solitary or in fascicles, pedicelled
Spikelet
disarticulating above glumes; glumes ± equal or unequal, narrow, as long as to longer than spikelet, 3-11-nerved, glabrous or hairy, obtuse to acuminate, awnless; lower glume usually 3-nerved
Floret
1, bisexual; lemma narrow, cylindrical, firmer than glumes, ventrally grooved or margins involute, indurated at maturity, 3-awned, appearing as 1 awn with 3 branches due to fusion, rarely solitary as laterals reduced; awns with or without a column, all, or only central awn plumose or with a pencil of hairs at apex of column, articulation present at or above middle of lemma or between base of column and body of lemma, or 0; callus well developed, pungent or minutely bifid, usually oblique, bearded or glabrous; palea usually much less than half as long as lemma, indurated, 2-nerved, glabrous
Lodicules
usually 2, or 0, obtuse
Stamens
3
Ovary
glabrous; styles free, plumose above
x = 11 (polyploidy)
Nomenclature:
Stipagrostis
Nees
Nees ab Esenbeck: 290 (1832)
Stapf: 551 (1899)
Henrard: 1 (1926-1933) under
Aristida
L.
Henrard: 45 (1929-1933) under
Aristida
L.
Chippindall: 291 (1955) under
Aristida
L.
Pilger: 123 (1956)
De Winter: 307 (1965)
Clayton: 137 (1970)
Launert: 187 (1970)
Melderis: 131 (1971)
Clayton & Renvoize: 185 (1986)
Gibbs Russell et al.: 318 (1990)
Watson & Dallwitz: 910 (1994)
Distribution & Notes:
Global
: Species ± 50, Africa, NW India and SW Asia
Southern Africa
: Species 29, widespread
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. 1970.
Flora of tropical East Africa
.
Gramineae
(Part 1)
CLAYTON, W.D. & RENVOIZE S.A. 1986. Genera graminum. Grasses of the world.
Kew Bulletin
. Additional series 13
DE WINTER, B 1965. The South African
Stipeae
and
Aristideae
(
Gramineae
). (An anatomical, cytological and taxonomic study).
Bothalia
8
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
HENRARD, J.T.H. 1926-1933. A critical revision of the genus
Aristida
.
Mededeelingen van's Rijksherbarium te Leiden
54 (1926), 54A (1927), 54B (1928) & 54C (1933)
HENRARD, J.T.H. 1929-1933. A monograph of the genus
Aristida
.
Mededeelingen van's Rijksherbarium te Leiden
58 (1929), 58A (1932), 58B (1933)
LAUNERT, E. 1970.
Gramineae
.
Prodromus einer Flora von Südwestafrika
160
MELDERIS, A. 1971.
Flora zambesiaca
10, 1
NEES AB ESENBECK, C.G.D. 1832. Plantae
Ecklonianae
.
Gramineae
.
Linnaea
7
PILGER, R.K.F. 1956.
Gramineae
II.
Die natürlichen Pflanzenfamilien
, edn 2, 14d
STAPF, O. 1898-1900.
Gramineae
.
Flora capensis
7
WATSON, L. & DALLWITZ, M.J. 1994.
The grass genera of the world
, revised edn. CAB International, Oxon
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