Canthium. | LXX. RUBIACEE (HIERN). 139 
Stigma calyptriform, much exserted; style pubescent (except the 
variety). Fruit didymous or dimidiate, 3-4 in. long ; albumen rumi- 
nated; embryo nearly straight.—Plectroniu zanzibarica, Vatke in 
Oesterr. Bot. Zeitschrift, xxv. p. 231 (1875). 
Nile Land. Bongo-land, Schweinfurth ! 
Mozamb. Distr. Zanzibar Island, Peters! Hildebrandt! Nazimoio, Kirk ! 
Var. glabristyle. Style glabrous. 
Mozamb. Distr. Zanzibar and Mombas, Bojer! Kirk! East Africa, Forbes ! 
right bank of Luabo, Kirk / Lake Nyassa, entrance of Roangiva, Kirk / 
15. C. gracile, Hiern. Glabrous except the inflorescence, un- 
armed. Branchlets slender, erect-patent, terete or at the extremities 
somewhat compressed, alternate. Leaves oval, subacuminate, mu- 
cronulate, more or less wedge-shaped at the base, chartaceous or thinly 
coriaceous, rather paler beneath, 14-4 by #2 in.; lateral veins 
about 4-6 pairs; petiole 1-2 in.; stipules lanceolate-subulate, erect, 
$f in. long. Flowers }—} in. long on short sparsely pubescent pedi- 
cels, many together, in short rather dense repeatedly dichotomous 
shortly pedunculate opposite or alternate panicles of 1—2 in. diameter. 
Calyx-tube turbinate, sparsely pubescent ; limb small, 5-dentate; teeth 
erect, hairy. Corolla glabrous outside; throat bearded ; lobes 5, ovate, 
glabrous. Anthers elliptical, pointed at both ends, rather longer than 
the filaments. Disk puberulous. Style far exserted, glabrous; stigma 
calyptriform, much exserted. 
Lower Guinea. Angola, at Ambriz, Monteiro! . 
16. G. Heudelotii, Hiern. Branches subterete, rather slender, 
puberulous and somewhat compressed towards the extremities. Leaves 
oval-ovate, more or less acuminate, obtuse or somewhat wedge-shaped 
at the base, thinly coriaceous, nearly glabrous, scarcely or slightly 
paler beneath, 3-4 by 14-2 in.; lateral veins about 7-9 pairs, slender, 
not conspicuous ; margins narrowly sub-revolute; petiole 3-3 in. 
puberulous ; stipules much apiculate from a deltoid base, inter- 
Petiolar, puberulous, } in. long. Common peduncles (in fruit) $ in. 
long, puberulous, patent ; fruiting pedicels }—2 in. long, rather numer- 
©us; bracteoles minute. Fruit obliquely subglobose or didymous, 
glabrate, + in. long; calyx-limb very small, glabrate, apparently pen- 
tamerous, subpersistent near the base of the fruit or in the case of the 
idymous fruits at the apex. Disk puberulous or glabrate. Albumen 
of the seeds ruminated.—Canthium, sp. nova, Benth. in Hook. Niger 
Fi. p. 410, 
Upper Guinea. Senegambia, Heudelot ! 
hot C Polycarpum, Schweinf. Mss. in Herb. A tree 40 feet 
igh, with very slender stem and elongated distichous glabrous 
angular unarmed erect-patent robust branches, forming a crown not 
unlike that of a tree-fern. Leaves oval, acuminate, obtusely narrowed 
jcat the base, chartaceous, glabrous or with short scattered curved 
ars on the midrib and the 5-8 pairs of lateral veins beneath, 34-44 
by 13-2 in. ; petiole 4-4 in., glabrous or nearly so; stipules ovate, 
