380. LXXXV. ASCLEPIADEZ (BROWN). : | Pentarrhinum. 
Lower Guinea. Lower Congo: Kisantu, on the Inkissi River, Gillet, (ex 
De Wildeman & Durand). Angola: Ambriz and by the River Kuanza, Monteiro ! 
Quizembo, Welwitsch, 4199! Lounda; in thickets near Penedo, Welwitsch, 4287! 
Golungo Alto; at Elinda in Terras de Bumba, Welwitsch, 4238! borders of forests 
along the Quiapose River, Welwitsch, 4239! Icolo e Bengo ; near the Lagoa de 
Foto, Welwitsch, 4240! Benguella; in the rocky thickets of Nene, towards Empa- 
Janca, Welwitsch, 4247 ! 
The Angolan plant differs from the Abyssinian only in the relative size 
of the staminal-column. According to Monteiro the “flowers have a delicious 
odour,” snd according to Welwitsch they are white or the corolla is green and 
the corona brilliantly white. 
24. PENTATROPIS, R. Br.; Wight & Arnott, Contrib. Bot. 52. 
Calyx 5-partite. Corolla 5-lobed nearly to the base ; lobes suberect, 
with spreading tips, overlapping to the left and more or less twisted to 
the right in bud. Corona simple, arising from the staminal-column, of 
5 laterally compressed lobes, adnate for half to two-thirds of their 
length to the backs of the anthers. Staminal-column arising from the 
base of the corolla, Anthers with membranous appendages inflexed 
over the truncate apex of the style. Pollen-masses pendulous, solitary 
in each cell of the anthers, affixed in pairs by short slender caudicles to 
the pollen-carriers. Follicles lanceolate, narrowed into a beak, smooth. 
Seeds crowned by a tuft of hairs.—Slender twiners with opposite 
petiolate leaves, and sublateral or subaxillary umbels of small flowers. 
Species about 6; the genus extends through Arabia, Beluchistan, the drier parts 
of India into China and the Malay Archipelago. There is no outer corona 4s 
described by Bentham in Benth. et Hook. f. Gen. Pl. ii. 764. 
Umbels 3-6-flowered ; pedicels 3-8 lin. long; 
corolla-lobes triangular, acuminate or tailed ne a oe cynanchoides. 
Umbels 8-10-flowered ; pedicels 23-3 lin. long; 
corolla-lobes deltoid, obtuse. 2. P. fasciculatus. 
1, P. cynanchoides, &. Br. in Salt, Voy. Abyss. Append. \xiv- 
Stems slender, twining, glabrous, except in the axils of the leaves and 
at the base of the young shoots, which are more or less pubescent. 
Leaves spreading; petiole 1-4 lin. long; blade 3-14 in. long, zis 
broad, oblong, ovate or elliptic-ovate, acute or obtuse, mucronate, more 
or less fleshy, glabrous. Umbels subaxillary, 3—6-flowered ; peduncles 
slender, 1-3 lin. long, or sometimes almost absent ; pedicels 3-5 
lin. long, filiform, sparsely puberulous. Sepals }~3 lin. long, ovate, 
acuminate, sparsely puberulous, or subglabrous. Corolla’ pentagonal 
and acuminate in bud, 5-lobed nearly to the base; lobes 4-9 Jin. 
long, narrowly linear from a triangular base, twisted in bud, gla- 
brous outside, minutely puberulous within. Coronal-lobes arising 
3 lin, above the base of the staminal-column and nearly oF quite 
reaching to its apex, varying in different flowers in the same umbel, 
2 lin. long, compressed, subtriangular in outline viewed sideways, sub- 
truncate at the base, adnate to the column for % of their length, with 4 
free narrowly oblong subacute or acute apex. Follicles 2-3 in. long; 
