378 LXXXV, ASCLEPIADEA (BROWN). | Pachycarpus, 
varying from greenish slightly tinted with purple to dark purple; 
lobes 6-8 lin. long, 4-5} lin. broad, ovate or oblong-ovate, subacute, 
apparently concave, spreading. Coronal-lobes arising at the base of 
the staminal-column, 5-6 lin. long, radiately spreading at the base, 
with the apical part incurved, gradually tapering from a 24-3 lin. 
broad subcordate-ovate base to a linear obtuse point, and bearing on 
the dilated basal part 2 erect parallel contiguous deltoid obtuse teeth 
1}-2 lin. long. Staminal column 23-3 lin. long, broadly and shortly 
conical ; anthers deltoid, about 2} lin. broad at the base, with very 
horny obliquely triangular much projecting wings. Pollen-carriers 
with very broad caudicles, which are } lin. long and about half as 
long as the oblong pollen-masses. Follicles not seen.—Asclepias con- 
color, Schlechter in Engl. Jahrb. xxi. Beibl. 54, 6, and in Journ. Bot. 
1896, 452; S. Moore in Journ. Bot. 1902, 256. Xysmalobium concolor, 
D. Dietr. Synop. Pl. ii. 902. Gomphocarpus concolor, Decne. in DC. 
Prod, viii. 563. 
Mozamb. Dist. Bechuanaland: near Palapye, 3000 ft., Lugard, 261! 
Buluwayo, Rand, 187! 
Also in South Africa. 
23. PENTARRHINUM, E. Meyer; Benth. et Hook. f. Gen. 
Fh 758. 
Calyx 5-partite. Corolla very deeply 5-lobed, rotate or reflexed; 
lobes overlapping to the left in bud. Corona of 5 lobes arising from 
the base of the staminal-column and alternating with the corolla-lobes, 
obconic or trumpet- or slipper-shaped, with infolded margins, forming a 
channel or a narrow funnel-shaped cavity within, truncate or rounded 
at the apex, with a horn directed forwards over or towards the anthers. 
Stamens arising from the base of the corolla, united into a tube around 
the ovary and style. Anthers with a terminal membranous appendage 
inflexed over the apex of the style; pollen-masses pendulous, solitary 1n 
each cell of the anther, attached in pairs to the pollen-carriers by 
slender caudicles. Follicles lanceolate, more or less beaked and more or 
less echinate. Seeds crowned by a tuft of hairs.—Perennial twining 
herbs with shorter stems. Leaves opposite, petiolate, cordate. Flowers 
small, arranged in pedunculate umbel-like corymbs, lateral at the nodes. 
Species 3, two occurring also in South Africa. 
Coronal-lobes thick and fleshy, obconic, truncate,with 
ashort straight horn . : é : . 1. P. insipidum. 
Coronal-lobes thin in the dried state, slipper-shaped, 
rounded at the apex, horn usually curved . . 2. P. abyssinicum. 
Ls insipidum, /. Meyer, Comm. 200. Stem twining, gla- 
brous or puberulous, or with a puberulous line down one side. Leaves 
spreading; petiole 4-2 in. long; blade 1-3 in. long, §-2 in. broad, 
cordate-ovate, acute or acuminate, with broadly rounded basal lobes, 
both sides glabrous. Peduncles lateral at the nodes, 1-3 in. long, gla- 
