Annual herbs; stems, leaves and peduncles softly pubescent
Leaves
opposite, petiolate or subsessile, simple, ovate to lanceolate, margins irregularly toothed
Capitula
radiate, few-flowered, in lax, leafy panicles
Involucre
campanulate or hemispherical; bracts in 2 rows: outer bracts spreading or reflexed, spathulate, long, with stalked, viscid glands and multicellular hairs, inner bracts ± enclosing ray cypselas
Receptacle
convex; paleae embracing disc florets
Ray florets
female, fertile, small; corolla yellow, strap-shaped, minutely 2- or 3-lobed
Anthers
slightly eared at base, with small apical appendage
Style
terete, slightly swollen at base; with oblong branches
Cypselas
ovoid-oblong, often incurved
Pappus
0
x = 10 (aneuploids, high polyploidy)
Nomenclature:
*Sigesbeckia
L.
Linnaeus: 900 (1753)
Linnaeus: 383 (1754)
Harvey: 132 (1865)
Oliver & Hiern: 371 (1877)
Bentham: 354 (1873)
Phillips: 814 (1951)
Wild: 36 (1967)
Hilliard: 300 (1977)
Karis & Ryding: 612 (1994)
Distribution & Notes:
Global
: Species 3, tropical Africa and Asia
Southern Africa
: Species 1: *
Sigesbeckia orientalis
L., mainly in eastern forest areas of KwaZulu-Natal and Eastern Cape
References:
BENTHAM, G. 1873.
Compositae
. In G. Bentham & J.D. Hooker,
Genera Plantarum
2. Lovell Reeve & Co., London
HARVEY, W.H. 1865.
Compositae
.
Flora capensis
3
HILLIARD, O.M. 1977.
Compositae
in Natal
. University of Natal Press, Pietermaritzburg
KARIS, P.O. & RYDING, O. 1994. Tribes
Helenieae
and
Heliantheae
. In K. Bremer,
Asteraceae
, cladistics and classification
. Timber Press, Portland, Oregon
LINNAEUS, C. VON. 1753.
Species plantarum
. Laurentius Salvius, Stockholm
LINNAEUS, C. VON. 1754.
Genera plantarum
, edn 5. Laurentius Salvius, Stockholm
OLIVER, D & HIERN, W.P. 1877.
Compositae
.
Flora of tropical Africa
3
PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2.
Memoirs of the Botanical Survey of South Africa
No. 25
WILD, H. 1967. The
Compositae
of the Flora zambesiaca area, 1.
Kirkia
6
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