192 ‘LXXXIV. APOCYNACEE (STAPF). [ Funtumia. 
as far as the Bakossi Mountains, Schlechter ; plentiful in the basin of the Ngoko 
{Goko), and Dscha (Jah) Rivers, Schlechter, 12746 ! 
South Central. Congo Free State: Ubangi District ; Libenge, on the River 
Lopore, Mardulier ! North of the Congo at Ngali, Thonner, 13! and without precise 
locality, Laurent, 3036! basin of the Upper Ituri, Arnold ! 
This is one of the most important rubber trees of Africa, concerning which much 
information can be found in Schlechter’s Westafr. Kautschuk-Expedition. Some of 
the fruits collected by Holland at Abarogba are remarkably small. Considering the 
difficulty of distinguishing F. elastica from F. africana and F. latifolia in the 
absence of flowers or fruits it may be useful to point out that the presence of 
minute pits (acarodomitia) in the nerve axils on the underside of the leaves 
of F, elastica and their absence in the other species is a convenient and, as it 
seems, reliable character. Mr. J. H. Holland, who first called my attention to 
it, found it very useful in the field. 
3. F. latifolia, Stapf ex Schlechter, Westafr. Kautschuk-Exped. 236. 
A tree about 50 ft. high; trunk straight, up to more than 3 ft. in 
diam. ; branchlets somewhat compressed in the upper part, otherwise 
terete, very minutely pubescent or almost glabrous, blackish when dry. 
Leaves oblong, lanceolate-oblong or elliptic, abruptly acuminate, 
rounded, acute or cuneate at the base, 6-10 in. long, 24-4 in. broad, 
minutely pubescent in bud, soon quite glabrous, margins undulate ; 
nerve-axils efoveolate; secondary nerves 10-15 on each side; veins” 
obscure; petiole 3-5 lin. long. Cymes shortly peduncled, many- 
flowered, dense, very minutely pubescent ; peduncle 2-3 lin. long; 
bracts small, ovate, acute or subacute ; pedicels 1-2 lin. long. Calyx 
14-1} lin. long; sepals ovate, subacute, sparingly and minutely pubes- 
cent on the back, each with two glands at the base. Corolla white, 
more or less delicately velvety without, short, conical or subcylindric 
and 6 lin. long in bud; tube constricted just below the middle, 
3-4 lin. long; lobes oblong, obtuse, 24-4 lin. long. Stamens inserted 
at the middle of the corolla-tube. Dise 5-lobed ; lobes entire or crenu- 
late, broadly rotundate, surrounding the ovary to 2 of its height. 
Follicles lanceolate when closed, acute, 5—6 in. long, laterally acutely 2- 
carinate, thin, woody. Seeds 9-10 lin. long, more or less covered wit 
long and somewhat deciduous silky hairs; awn 11-12 lin. long, hairs 
2-in. long.—Stapf in Hook. Ic. Pl. sub tt. 2694-2695. Kickxia latifolia, 
Stapf in Kew Bulletin, 1898, 307 and in De Wild. & Durand, Contrib. 
FI. Congo, i. 42; De Wild. & Durand, l.c., fase. ii. 41; Preuss 
Notizbl. Konig]. Bot. Gart. Berlin, i. 353-359, fig. A-H ; Schlechter 1 
Tropenpfl. iv. 30 and Westafr. Kautschuk-Exped. 63, 64, 125 with 
fig., 236, 307; Warb. Kautschukpfl. 112 and Plant. & Caoutch. 205; De 
Wild. in Rev. Cult. Colon. vii. 633, 634; De Wild. & Durand, Reliq- 
Dewevr. in Ann. Mus. Congo, Bot. sér. iii. fase. i. 157 ; Vilb. in Warb. 
Plant. 4 Caoutch. 205, fig. 16, 207. K. Scheffleri, K. Schum. in N otizbl. 
Konigl. Bot. Gart. Berlin, iii. 81. X. congolana, De Wild. in Rev. Cult. 
Colon. vii. 745. 
Lower Guinea. Lower Congo : Kisantu, Gillet, 387 ! 
South Central. Congo Free State: along the River Congo at Bangals, 
Dewevre, 867! near New Antwerp, Duchesne, 14! and near Coqu'lhatville, Gentil: 
