Landolphia.'] lxxxiv. apocynace.e (staff). 31 



sessile in few- or many-flowered corymbs at the ends of the branches 

 (sometimes overtopped by barren shoots and then occasionally pseudo- 

 axillary), or gathered in more or less elongate panicles at the ends of 

 their distant branches which are (like the rhachis) sensitive, and act as 

 hooks or tendrils. 



About 40 species, in tropical Africa, extratropical Soutli-east Africa, and the 

 Mascarene Isl mds. 



The plant described by Aublet as Pacouria is very probably a species of Lan- 

 dolphia, § Anvylohotrys. It was found in French Guiana by Aublet, but has never 

 been collected again, and is perhaps not indigenous there. The seeds of several 

 species have been descril.ed as being covered with a dense coat of hairs. Lecomte 

 has pointed out in Journ. de Bot. 1901, 86-88, that this appearance is due to the 

 presence of a great number of laticiferous cells in the pericarp, the inner parts of 

 which iro to form the pulp. This closely envelops the seeds, and, as the orientation 

 of the laticiferous cells is more or less at right angles to the surface of the seed and 

 their refractive power diffei-s from the rest, produces the impression of the presence 

 of a coat of hairs. 



*Jasminociiyla. — Flowers few, in terminal corymbs, short racemes or small 

 panicles. Calyx 1-1^^ lin. long, ciliolate or perfectly glabrous. Corolla-tube 2^-5 

 lin. long, cylindric, slightly widened froir. the middle upwards; lobes 3^-8 lin. long, 

 not ciliate, as long as or longer than the tube. Stamens inserted about the middle 

 of the corolla-tube. Ovary glabrous ; style not or slightly exceeding the calyx. 

 Fruit globose with a coriaceous rind, having no sclerenchymatic layer. Endosperm 

 coarsely pitted. 



Sepals conspicuou-ly ciliate; secondary nerves of 



leaves 8-10 on each side . . . . \. L. wafsoniana. 



Sepnls eciliate ; secondary nerves of leaves 10-18 

 on eacii side. 

 Flowers on pedicels up to 3 lin. long, in lax 



I'acemes or small panicles . . . . 2. i. kllimnndjarica . 



Flowers on very short pedicels, in small rather 

 dense corymbs. 

 Corolla-lobes 8-5^ lin. long . . . . 3. i. Buchananii. 



Coi'olla- lobes up to 8 lin. long . . . 4. Z. Cameronis. 



**Vahea. — Flowers many, in dense terminal corymbs, or the corymbs gathered 

 in elongate sensitive panicles. Calyx 1-lA lin. long, hairy or glabrous. Corolla-tube 

 6-11 lin. long, slightly inflated below the middle, othervvise very slender; lobes 8-15 

 lin. long, not ciliate. Stamens inserted at the lower ^ of the corolla-tube. Ovary 

 glabrous or hairy; style distinctly exceeding the calyx, sometimes by more than 1 

 calyx-length. Fruit more or less globose with a thick hard rind, havin;^ a scleren- 

 chymatic layer. Endosperm smooth. 



Corolla-lobes much shorter than the tube . . h. L. leonensis. 



Corolla-lobes at least as long as the tube. 



Calyx |-1 lin. long ; corolla-tube 6-6^ lin. long ; 



ovary glabrous . . . . . 6. i. sener/alensis. 



Calyx li lin. long ; corolla-tube 8-11 lin. long ; 



ovary densely tomentose . . . .7. L.florida. 



***Mesandrcecia. — Flowers many, in dense conspicuously bracteate corymbs at 

 the ends of the brant-hes or several of them gathered in elongate terminal panicles. 

 Calyx 2^-3 lin. long, hairy ; sepals similar to the bracts usually with letlexed tip?. 

 Corolla-tube 6-9 lin. long, spindle-shaped ; lobes 5-10 lin. long, eciliate. Stamens 

 inserted at or just above the middle of the corolla-tube. Ovary villous or glabrous; 



