Glossostephanus.| | ASCLEPIADEE (Brown). 741 
DC. Prodr, viii. 508; (A. lanceolatus), Schlechter in Journ. Bot. 
1896, 418. Oncinema Roxburghii, Arn., and Periploca capensis, Roab. 
ex Arn. in Edinb. New Phil. Journ. xvii. 261; Decne in DC. Prodr. 
vili. 526. 
SoutH Arrica : without locality ; Masson ! ‘ 
Coast REGION: Malmesbury Div. ; Zwartland, Thunberg! Worcester Div. ; 
Dutoits Kloof, Drége, 1873! mountains near Worcester, Rehmann, 2497 ! Paarl 
Div. ; by the Berg River, Pappe! Caledon Div., by the Zondereinde River, 
Drége, 2229! Houw Hoek, Schlechter, 7375! Swellendam Div. ; Grootvaders 
Bosch, Thunberg! Riversdale Div. ; by the Great Vals River, Burchell, 6556! by 
the waterfall, Garcias Pass, Burchell, 6983 ! George Div. ; mountains near George, 
600 ft., Bolus, 8685 ! Uniondale Div. ; near the Keurbooms River, Burchell, 5114! 
Humansdorp Div. ; near Witte Els River, Galpin, 4828! Uitenhage Div. ; Van 
Stadens River, MacOwan, 1930 ! 
Apocynum lanceolatum, Thunb., is merely the broader leaved form of the plant 
and equivalent to MacOwan, 1930, Schlechter, 7375, &e. 
XXI. PENTARRHINUM, E. Meyer. 
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 in each anther-cell, attached in 
pairs to the pollen-carriers by slender caudicles. follicles lanceo- 
late, more or less beaked and more or less echinate. Seeds crowned 
by a tuft of hairs. 
Perennial twining herbs, with slender stems ; leaves opposite, petiolate, cordate ; 
flowers small, arranged in pedunculate umbel-like corymbs, lateral at the nodes. 
Distrr1B. Species 3, of which one extends into Tropical Africa and another is 
endemic there. 
1. P. insipidum (E. Meyer, Comm. 200); stem twining, usually © 
puberulous, sometimes glabrous ; leaves spreading ; petiole 4-2 in. 
long; blade 3-3 in. long, 4-2 in. broad, cordate-ovate, acute or 
acuminate, with broadly rounded basal lobes, glabrous on both 
sides; peduncles lateral at the nodes, 1-3 in. long, usually 
puberulous along one side, occasionally glabrous ; corymbs 1-1} in, 
in diam., the axis elongating into a raceme as the flowers develop ; 
bracts 4-1 lin. long, subulate, deciduous ; pedicels 4-10 lin. long, 
puberulous ; sepals 1-1} lin. long, lanceolate, acute, more or less 
puberulous, ciliate ; corolla reflexed ; lobes about 2 lin. long, 1-1} 
lin. broad, oblong, obtuse, glabrous on both sides, minutely ciliate, 
