784 ASCLEPIADEA (Brown). | Rhyssolobiwm. 
anthers erect, terminated by a membranous appendage. Pollen- 
masses erect, attached in pairs by short caudicles to the elongated 
erect pollen-carriers. Follicles small, evidently thick and fleshy, 
only the dried flattened-out remains seen, which are covered with 
very crowded and very thin longitudinal lamella-like ridges outside 
and with fewer and much coarser ridges inside, both of which may 
be due to shrinkage. Seeds not seen. 
A small, much-branched shrublet with woody whitish-puberulous branches. 
Leaves opposite or at the base of the branchlets subfasciculate, small and thick, 
subterete from the revolute margins ; flowers 1-3 together, subsessile at the nodes, 
very small, 
DistriB. Species 1, endemic. 
1. R. dumosum (E. Meyer, Comm. 217); a small, much-branched 
shrublet less than a foot high; branchlets woody, rigid, whitish- 
puberulous ; leaves opposite or subfasciculate, subsessile, 1}—3 lin. 
long, 4-3 lin. broad, linear, obtuse, very thick, from the very 
revolute margins, puberulous ; flowers 1-3 together, subsessile at 
the nodes ; sepals about 1 lin. long, } lin. broad, lanceolate or ovate- 
lanceolate, acute, thick, keeled on the back, puberulous ; corolla 
campanulate, glabrous outside and on the lower part of the tube 
within, the throat of the tube and inner face of the lobes, except at 
the tips, densely bearded with long hairs; tube 1 lin. long ; lobes 
1-1} lin. long, 2 lin. broad, oblong, obtuse, slightly spreading ; 
staminal column 3 lin. long, cylindric ; anther-appendages oblong, 
subacute, connivent-erect over the short obtusely conical style-apex ; 
follicles 1-11 in. long, probably lanceolate - fusiform, thick and 
fleshy, glabrous, the dried remains densely covered with very thin 
longitudinal ridges not thicker than paper. Harv. Gen. S. Afr. 
Pl. ed. i. 227, and ed. 2, 239; Decne in DO. Prodr. viii. 626 ; 
Schlechter in Journ. Bot. 1896, 458.  Astephanus dwmosus, Dietr. 
Syn. Pl. ii. 909. 
Western Recron: Little Namaqualand ; on dry hills near Arris, towards the 
mouth of the Orange River, below 200 ft., Drége, 3049 ! 
XXXV. ORTHANTHERA, Wight. 
Calyx 5-partite. Corolla-tube elongated, slightly or globosely 
inflated at the base, often with the inflation extending between the 
sepals into 5 blunt angles; lobes 5, erect or spreading, valvate 1n 
bud, sometimes with minute pocket-like thickenings at the sinuses 
between them. Corona of 5 erect A-shaped lobes arising at or near 
the base of the staminal column and adnate to it between the pairs 
of anther-wings, nearly or quite as long as the latter, with free out- 
standing or reflexed wing-like (when dried) margins. Staminal 
column arising from the bottom of the corolla-tube and enclosed in 
the inflated part ; anthers connivent-erect, linear or oblong at the 
