Landolphia.] lxxxiv. ArocYNACE^ (staff). 35 



3. L. Buchananiiy Stapf. A climbing shrub, perfectly glabrous- 

 in all its parts; young branches slender, dark reddish-brown, dotted 

 and often rough with numerous lenticels. Leaves oblong or subovate- 

 -oblong, obscurely (rarely distinctly) and obtusely acuminate or obtuse, 

 rounded at the base, 2— J: in. long, -J- li in. broad, chartaceous, flossy 

 above ; midrib slender, channelled above, slightly raised below ; secon- 

 dary nerves extremely slender, 11-lG on each side, rather spreading, 

 straight, connected rather close to the margins by flat equally fine 

 arches ; network of veins delicate, very inconspicuous, faintly impressed 

 above ; petiole 2h lin. long. Corymbs small, few-flowered, dense, 

 glabrous, WQry shortly peduncled or subsessile, much shorter than tlie 

 leaves ; bracts small, ovate, obtuse ; pedicels up to 1 lin. long. Calyx 

 slightly over 1 lin. long, quite glabrous, dark brown, with pale thin 

 margins when dry ; sepals ovate, broad, obtuse. Corolla dark-reddish 

 when dry, quite glabrous ; tube subcylindric, somewhat stout, slightly 

 widened from the middle upwards, 2 J-3 J lin. long ; lobes oblong, obtuse, 

 4i-5|^ lin. long, rather straight. Stamens inserted at the middle of the 

 corolla-tube. Ovary depressed ovoid, sulcate, glabrous ; style and 

 stigma about 1 lin. long ; stigma shortly cylindric from a thickened 

 base, bifid. Fruit globose, Iv-lf in. in diam. ; rind thin, leathery, 

 without a sclerenchymatous layer ; seeds oblong, in a fibrous juicy pulp, 

 up to 7 lin. long ; albumen horny, coarsely pitted ; cotyledons very thin, 

 foliaceous. — ClUandra Biichanani, Hallier f. Kautschuklianen in Jahrb. 

 Hamburg. Wissensch. Anstalt. xiv. (1899), 3. Beih. 118. 



Mozamb. Dist. British Central Africa : Xyasaland ; Shire Highl.inds, 

 Buchanan, ! Mount Mlanji, Brown ! Masuka Plateau, in forests, 6500-7000 ft., 

 Whyte ! and without precise locality, Buchanan (coll. 1891 without number) I and 

 :220 and 286 partly ! 



This is said to yield india-rubber. A barren specimen collected by Buchanan 

 (138), at 5000 ft., near Blantyre, may be a slightly hairy form of this species. The 

 leaves are exactly like those of L. Buchananii, but the ])etioles of some of them, as 

 well as some of the very young branches and tendrils, are more or less covered with 

 short, stiff, fine hairs. Buchanan describes it also as an india-rubber plant. The 

 tendrils are very slender, long and branch-hooked. 



4. L. Cameronis, Stapf. A climbing shrub with long slender 

 liook-branched tendrils from the branch-forks, quite glabrous ; young 

 branches brown or reddish-brown, dotted and often rough with numerous 

 ienticels. Leaves oblong, subovate-oblong or oblong-lanceolate, obscurely 

 4xnd obtusely acuminate or subobtuse, rounded (rarely subacute) at the 

 base, 2-3 in. long, ^-Ih in. broad, chartaceous or thinly coriaceous, 

 faintly glossy above ; midrib slender, channelled above, slightly raised 

 below; secondary nerves extremely slender, 10-15 on each side, rather 

 spreading, straight, connected close to the margin by flat equally fine 

 arches ; network of veins delicate, very inconspicuous, faintly impressed 

 above ; petiole LJ lin. long. Corymbs small, 4-8-flowered, moderately 

 dense, glabrous, shortly peduncled, much shorter than the uppermost 

 leaves; bracts small, oblong or ovate, or the uppermost rotundate, 

 obtuse; pedicels up to iHin. long. Calyx slightly over 1 lin. long, 



