Landolphia.] lxxxiv. APOCYNACEiE (staff). 55 



Anstalt. iii. (1886) p. Ixxvi., ix. 1 (1891) 226; Kulturg. Deutsch. 

 Kolon. 274. V. senegamhensis, var. Trau7iii, Sadeb. in Jahrb. Ham- 

 burg. Wissensch. Anstalt. iii. (1886) Ixxvii. 



Upper Guinea. Senegambia: Gombo, Heudelot. Mboro, Leprieur ! sandy 

 diy soil near Albreda, and very cominon in the Cape Verd Peninsula and by the 

 Gambia and Casamanze Rivers, Perrottet, 491 ! in the neighbourhood of the Casa- 

 manze and Nunez Rivers, Eeudelot, 602 ! 606 ! Cape Verd Isles : San Jago, 

 Boeande. Senegal, Michelin ! Portuguese Guinea: Biss&o, Traun. French Guinea: 

 Faroisse, 14, 20, 21, 22, 27. Futa Jallon : Timbo, Miquel; Kisosso, Maclaud, 

 24:2 ; Bramaya, Faroisse, 20, 214 ; at Bayabaya, near the River Searcies, Scott- 

 Elliot^ 4544 ! 4773 ! and near Wallia, Scott-Elliot, 4630 ! 



Var. B Djenge, Stapf in Jouui. Linn. Soc. xxx. 87. Fruit globose or depressed- 

 globose, not stipitate. 



Upper Guinea. Sierra Leone : Searcies River, near Kukuna, Scott-Elliof, 

 4650 ! 4675 ! Falaba, Scott-Elliot, 5450 ! 



Hallier f . also enumerates the following specimens under L. Heudelotii : Togo : 

 Little Popo, Traun ; Rismarckburg, Biittner, 325 ; Misahohe, Baumann, 517 ; 524. 

 -Cameroons : Yaunde, Zenker, 662. Lower Congo : Stanley Pool, Laurent. Of 

 these I have only seen Zenker's 662, without flowers or fruits. It is ceitainly not 

 L. Heudelotii, but probably L. otoariensis. The same may be the case with the 

 Togo specimens, of which Hallier himself says that they much resemble L. otoariensis. 

 They were releri'ed to L. Heudelotii on account of the length of the coroUa-lobef, 

 which are on the whole slightly longer in L. Heudelotii than in L. otoariensis ; bu 

 this is no reliable character. The two species differ chiefly in the shape of thv 

 sepals and corolla-tube, and in the insertion of the stamens. L. Heudelotii w&: 

 originally described from almost glabrous specimens ; such seem, however, to rarel^ 

 occur, the tomentose form being the common one. Th-s species is, amouk 

 Apocynacece, undoubtedly one of the most valuable sources of rubber in West Africa 

 Hua and Chevalier, I.e., give an elaborate description of the area inhabited by it in 

 French Guinea. It extends from Senegambia far into the basin of the Upper Niger 

 and to the head waters of the Volta, being one of the characteristic features of the 

 vegetation on the dry laterite plateaux of the interior. 



24. L. Kirkii, Dyer in Kew Report, 1880, 39, 42. A scandent 

 shrub, with long branched tendrils (modified inflorescences); young 

 branches fulvo-pubescent or finely tomentose, at length glabrescent, 

 reddish-brown with small whitish lenticels. Leaves very variable in size 

 and shape on the same branch, lanceolate to oblong, rarely more or less 

 ovate or elhptic, usually gradually tapering into a short obtuse acumen, 

 shortly acute or obtuse at the base, 1-4 in. long, 10-15 hn. broad, 

 thinly coriaceous, very loosely pubescent on both sides (except the mid- 

 rib which is generally densely pubescent to villous below), finally more 

 or less glabrescent, chiefly above, glossy above ; midrib shal lowly 

 channelled above, prominent below; secondary nerves 10-12 on each 

 side, very slender, slightly oblique, like the delicate network of the 

 veins slightly raised on both sides ; marginal arches obscure ; petiole 

 slender, 2-3 lin. long. Corymbs dense, subsessile, many-flowered, or 

 panicles somewhat loose, ovoid or much elongated, with spreading 

 branches often passing into tendrils, fulvo-pubescent or finely tomen- 

 tose all over ; bracts minute, ovate ; pedicels very short. Calyx 

 scarcely 1 lin. long. ; sepals ovate, acute or subacute, membranous 



