Leaves
usually petiolate, lanceolate; stipules ovate, deciduous
Flowers
terminal, usually in axillary, pedunculate, corymbose cymes; bracts present or 0; bracteoles present, often on pedicel
Calyx
usually 5- or 6-lobed; lobes oblong, concave, ± as long as or somewhat shorter than cylindric tube
Corolla
white to yellowish, glabrous or bearded in throat; lobes ± oblong, contorted; tube cylindrical, slightly shorter or longer than lobes
Stamens
5 or 6, arising in corolla throat, ± included; filaments linear, shorter than anthers; anthers linear, minutely apiculate, obtusely sagittate
Disc
annular
Ovary
2-locular, with 1 or more ovules in each locule on fleshy placentas; style terete, ± exserted; pollen presenter narrowly spindle-shaped, bifid at apex only, rarely completely bifid
Fruit
either 1-locular and 1-seeded or 2-locular with 1-several seeds in each locule, scarcely fleshy, usually pale green to green, white or black when mature
Seeds
spherical with an irregular to ± regular hilar cavity; surface reticulate
x = 11
Nomenclature:
Tarenna
Gaertn.
Gaertner: 139 (1788)
Hiern: 88 (1877)
Phillips: 725 (1951)
Bridson & Verdcourt: 584 (1988)
Coptosperma
Hook.f.
Hooker: 86 (1873)
Enterospermum
Hiern
Hiern: 92 (1877)
Zygoon
Hiern
Hiern: 114 (1877)
Distribution & Notes:
Global
: Species 180, Old World tropics
Southern Africa
: Species 8, Northern Province, Mpumalanga, Swaziland, KwaZulu-Natal and Eastern Cape
References:
BRIDSON, D.M. & VERDCOURT, B. 1988.
Flora of tropical East Africa
.
Rubiaceae
(part 2)
GAERTNER, C.F. 1788.
De fructibus et seminibus plantarum
1. G.H. Schramm, Tübingen
HIERN, W.P. 1877.
Rubiaceae
.
Flora of tropical Africa
3
HOOKER, J.D. 1873.
Rubiaceae
. In G. Bentham & J.D. Hooker,
Genera plantarum
2. L. Reeve, London
PHILLIPS, E.P. 1951. The genera of South African flowering plants.
Memoirs of the Botanical Survey of South Africa
No. 25
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