138 LXX. RUBIACEE (HIERN). [ Canthium. 
12. G. discolor, Benth. in Hook. Niger Fl. p. 409. A shrub or 
small tree; branchlets rufous-pubescent ; branches divaricate, elon- 
gated, glabrate, spinous or unarmed ; spines axillary, opposite or 3 in 
a whorl, patent, subulate, acute, 3-1 in. long. Leaves oval, obtusely 
acuminate, obtusely narrowed at the base, glabrate except the midrib, 
dark above, whitish beneath, chartaceous, 1-3 by 3-14 in.; lateral 
veins about 4-6 pairs; petiole shortly pubescent, ~5—} in. ; stipules 
subulate, 3} in. long, puberulous or glabrate. Flowers 3-} in. long, 
on short slender puberulous pedicels arranged in divaricately branched 
tortuous shortly pedunculate panicles of 4-14 in. long. Calyx-tube 
small, hemispherical, puberulous or glabrate; limb wider, deeply 
5-lobed, glabrous ; lobes deltoid, obtuse, spreading. Corolla glabrous 
outside, tubular ; tube strigose with deflexed white hairs near the base 
inside ; lobes 5, reflexed, ovate, scarcely acute. Disk prominent, gla- 
brous. Anthers about equalling the filaments. Stigma exserted, calyp- 
triform ; style slender, glabrous. Fruit 4-2 in. long, subdidymous oF, 
by abortion of one cell, oblique; seeds curved round the placentas. 
Upper Guinea. Sierra Leone, G. Don! Afzelius/ and others ; Senegambia, 
Heudelot ! Bagroo River, Mann ! 
13. G. oligocarpum, Hiern. A large glabrous tree-like shrub, 
unarmed. Branches ashy, terete, somewhat compressed towards the 
extremities, patent. Leaves elliptical, obtusely acuminate, nearly 
rounded or somewhat wedge-shaped at the base, thinly coriaceous, 
paler beneath, 14-24 by 4-1 in.; lateral veins about 4 pairs, incon 
spicuous, often with a glandular pit in the axil; petiole ~y—¢ ™ 
stipules ovate, acuminate, about 3 in. long. Infructescence about | 10. 
long, axillary or in the axils of fallen leaves, spreading, 1 -fruited ; 
bracteoles minute. Fruit oblique, 2 in. long, rounded at both ends, 
very unequally 2-celled, 1-seeded, crowned by the minute remains 0 
the 5-toothed calyx-limb. 
Wile Land. Abyssinia, on a mountain slope (7000-8000 feet) Schimper ! 
14. G. zanzibaricum, Klotzsch in Peters Mossamb. p: 991, A 
much branched, sometimes scandent, unarmed shrub. Branches 80 be 
terete or obtusely 4-sided, glabrous, greenish, at length whitish, 
patent. Leaves ovate or oval, obtusely acuminate or attenuate-acute, 
rather unequal and obtuse, usually rounded or somewhat hollowed at 
the base, coriaceous, glabrons or nearly so, rather paler beneath, 13-4 
by 1-24 in.; lateral veins about 6-8 pairs, sometimes rather hairy 
the axils; petiole 4-4 in., glabrous ; stipules lanceolate-subulate from 
a broad base, glabrate, }-4+ in., caducots or subpersistent. Flowers 
3-} in. long, 5-4-merons, white, on hispidulons pedicels of ys3 
many together in dense dichotomous panicles of 1-2 in. diameter; 
common peduncle }— in., hispidulous or glabrate ; bracteoles ovate oF 
lanceolate, acute, small, ciliolate. Calyx-tube hispidulous or nearly 
glabrous, campanulate-turbinate ; limb dentate; teeth small, ciliolate. 
Corolla-throat pubescent; lobes subobtuse. Disk somewhat harry: 
