Landolphia. | LXXXIV. APOCYNACEH (STAPF). a1 
Upper Guinea. Cameroons: Yaunde, Zenker, 538 ! 
Var. y tomentella, Stapf. Young branches and tendrils densely fulvo-tomentose. 
Leaves oblong to elliptic, obtuse or obtusely subacuminate, 2-3} in. long, 1-1} in, 
broad, quite glabrous above (except on the midrib), softly pubescent below when young, 
soon glabrescent. Fruit globose, 1} in. in diam., smooth, dotted with numerous 
lenticels ; rind 1 lin. thick.—Z. owaricasis, forma, Dyer in Kew Report 1880, 38. 
L. Heudelotii, K, Schum. in Engl. Jahrb, xv. 407 partly, t. xii. fig. B; in Engl. Pf. 
Ost-Afr. B, 446-459 partly; in Engl. and Prantl, Pflanzenfam. iv. ii. 180 partly. 
Hallier f.1.c. 75 partly; Hua & Chevalier, in Journ. de Bot. xv. (1901) 70 (not 
elsewhere). Carpodinus acidus, Schweinf. Heart of Africa, i. 185, not of Don; 
C. sp. Schweinfurth, lc. 192. 
Wile Land. British East Africa: Jur; Wau, Schweinfurth, 1667! Kurshook 
Ali’s Seriba, Schweinfurth, ser, iii, 70! Jur Ghattas, Schweinfurth, 1377 ! 
L, owariensis is one of the principal sources of West African rubber. 
L. Gentilii, De Wild., Apoeyn. a latex rec. par Gentil, 20, seems to me identical 
with LZ. owariensis. The specimen from which ZL. Gentilii was described formed 
part of a sample of “ Bongew,” the rest of it being admitted by De Wildeman as 
L. owariensis. According to the author the former differs in having somewhat 
narrower leaves, a more pubescent corolla-tube (pubescent all over without, except 
where it is covered by the calyx), longer corolla-lobes (23 lin, against 1-13 lin, in 
L. owariensis), a slightly different stigma and smaller fruits. As to the fruits, the 
author himself says that he saw only some very young ones, and Gentil’s description 
of their being “small” is too vague and may also refer to immature fruits. The 
other differences seem to lie well within the ordinary limits of variation of Z. 
owariensis, 
20. L. Klainei, Pierre in Bull. Soc. Linn. Paris, 1898, 13, 15. 
A scandent shrub with long branched tendrils (modified inflorescences) ; 
young branches more or less pubescent, soon glabrescent, dark reddish- 
brown, dotted with minute whitish lenticels. Leaves oblong, gradually 
tapering to an obtuse or subacute acumen, rounded or shortly subacute 
at the base, 5-6 in. long, 14 to more than 2 in. broad, coriaceous, pubes- 
cent when quite young, soon glabrous, somewhat glossy above; midrib 
distinctly sunk above, prominent below; secondary nerves 13-15 on 
each side, moderately oblique, very slender, connected by strongly curved 
delicate zig-zag arches rather close to the margin, like the delicate net- 
work of veins slightly raised on both sides; petiole 2 lin. long, slightly 
pubescent in the younger leaves. Corymbs dense, subsessile, many- 
flowered, or panicles elongate, with distant spreading branches passing 
into tendrils, fulvo-pubescent or finely tomentose all over (including the 
calyces) ; bracts oblong to ovate, obtuse; pedicels very short. Calyx 
slightly over 1 lin. long; sepals broad-oblong or ovate, subacute or 
very obtuse and apiculate; midrib often slightly prominent and 
acute. Corolla-tube cylindric to the middle, then widened and con- 
stricted again below the mouth, 2} lin. long, very finely pubescent 
except at the base ; lobes linear, obtuse, slightly shorter than the tube, 
finely pubescent along the middle without, mouth very narrow and 
very minutely pubescent. Stamens in the upper third of the tube; 
anthers linear-oblong, subacute. Ovary oblong-ovoid, tapering into the 
style, top very finely pubescent ; style and stigma almost 1} lin. long, 
the latter slender-cylindric, bifid. Fruit very large globose, 6-10 in. in 
