Shrubs or small trees, occasionally somewhat scrambling
Leaves
opposite or occasionally in whorls of 3, petiolate; often with domatia in axils of nerves beneath; stipules connate at base, oblong or triangular, villous within, often ± persistent, ending in a linear or subulate, ± deciduous appendage
Flowers
axillary, solitary or in 2-10(-15)-flowered, sometimes umbel-like cymes; peduncles and pedicels mostly well developed; bracts and sometimes bracteoles present, small
Calyx
with tube ± subglobose; limb short, truncate or shortly toothed
Corolla
5-lobed, white, cream, yellowish or greenish; lobes shorter than to longer than tube, acute to very distinctly long-apiculate or with a filiform appendage; tube cylindric, glabrous or hairy with a ring of deflexed hairs in middle
Stamens
5, slightly to distinctly exserted; anthers often mucronate or slightly appendaged, often papillate; filaments very short
Disc
depressed, glabrous
Ovary
2-5(6)-locular; ovules 1 per locule, pendulous, attached to upper part of septum; style usually exserted, slightly swollen at base; stigmatic knob coroniform, 2-5-lobed at apex
Fruit
a subglobose drupe, with (2-)4 or 5 pyrenes; pyrenes narrowly ± reniform or boat-shaped, often pitted
x = 11 (1 report, polyploidy)
Nomenclature:
Rytigynia
Blume
Blume: 178 (1850)
Robyns: 132 (1928)
Phillips: 731 (1951)
Verdcourt: 145 (1987)
Verdcourt & Bridson: 802 (1991)
Bridson: 284 (1998)
Distribution & Notes:
Global
: Species 70, tropical Africa
Southern Africa
: Species 2, Botswana and N KwaZulu-Natal
References:
BLUME, C.L. 1850.
Museum botanicum
. E.J. Bril, Leiden
PHILLIPS, E.P. 1951. The genera of South African flowering plants.
Memoirs of the Botanical Survey of South Africa
No. 25
ROBYNS,W. 1928. Monographieae
Vangueriae
.
Bulletin du Jardin Botanique de l'Etat, à Bruxelles
11
VERDCOURT, B. 1987. Notes on African
Rubiaceae
-
Vanguerieae
.
Kew Bulletin
42
VERDCOURT, B. & BRIDSON, D.M. 1991.
Flora of tropical East Africa
.
Rubiaceae
(part 3)
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