Strophanthus. } ‘LXXXIV. APOCYNACE# (STAPF). 187 
Gilg says that this species occupies an isolated position in the genus. Not 
having seen it myself when the key was drawn up, I placed the species here. 
Since then I have been able to examine an authentic specimen, and have no doubt 
that it comes nearest to S. gracilis. 
32. S. sp., Heckel in Ann. Inst. Colon. Marseille, iv. 201-208, with 
plate. Follicles cylindric, obtuse, subemarginate, 6 in. long, 1-1} in. 
in diam. when closed, almost smooth. Seeds oblong, shortly acumi- 
nate, velvety, reddish-brown, 6-7 lin. long, 2-23 lin. broad ; awn 
1{-1} in. long, naked part 2-24 lin. long; hairs 1}-1} in. long.— 
Strophanthus d@ Autran, Heckel, |.c.; Payrau, Strophanthus, 109-110, 
with figs. 
Lower Guinea, (taboon: Guégué, near Libreville, Autran. 
33. S. sp., Pax in Engl. Jahrb. xv. 384. Follicles 7-10 in. 
long, 21 in. broad, greyish-brown to brown, very hard. Seeds brown, 
obtuse at the base or subobtuse, 6-64 lin. long; awn 24-2} in. long, 
the naked part longer than the plumose.—Awrzfriichtiyer Strophanthus, 
Pax, lc. 
A drug imported, according to Pax, from West Africa, Lake Victoria, Kili- 
manjaro and the Mozambique Coast. 
34. S. sp., Pax in Engl. Jahrb. xv. 385. Follicles 10-12 in. long, 
slender, brownish, moderately hard. Seeds greenish-brown, very acute 
at the base, 10 lin. long; awn plumose from the base, 10 lin. long; 
hairs 10-15 lin. long.—Senegal Strophanthus, Pax, l.c. 
Upper Guinea. Upper Senegal. 
35. S. sp. Helbiny in Pharm. Journ. xvii. (1887), 748. Seeds 
similar to those of S. Kombe, but more densely covered with looser, 
longer, almost white silky hairs.—‘ White Strophanthus,” Helbing, 1.c. 
Mozamb. Dist. Shire Highlands. 
31. ISONEMA, R. Br.; Benth. et Hook. f. Gen. Pl. ii. 712. 
Calyx small, subcoriaceous ; sepals 5, almost free, imbricate, acute, 
alternating with large 2—3-partite glands. Corolla salver-shaped ; tube 
naked at the mouth, cylindric ; lobes with a lateral crisp lobe on the 
inner (left) side, inflexed in bud, overlapping to the right. Stamens 
inserted near the mouth of the corolla; anthers conniving in a 
cone, exserted, lanceolate, sagittate, wings thin with thick incurved 
margins; tails slender, acute ; foot of connective rather flat with a dense 
tuft of hairs in the centre; filaments filiform, short, passing into long 
thin much projecting hairy ridges on the corolla-tube. Disc 0. Carpels 
2, free ; style filiform, long ; stigma capitate, 5-grooved, viscous, with a 
reflexed frill at the base, and a small 2-lobed apiculus, agglutinated to 
the hair-tuft of the anthers; ovules numerous, multiseriate. Mericarps 
follicular, cylindric, slender, divaricate; placenta much intruding. 
