902 ASCLEPIADE& (Brown). [ Tavaresia. 
1905, p. 3; K. Schum. in Engl. wnd Prantl, Pflanzenfam. iv. ii. 275 ; 
Gard. Chron. 1900, xxvii. 210, fig. 67; Schlechter in Journ. Bot. 
1898, 476. 
CenTRAL ReGIon: Richmond Div.; Karoo, near Richmond Road Station, 
Foster in Herb. Pillans, 99! Colesberg Div. ; near Colesberg, Shaw ! Barkly, 26 ! 
Prieska Div. ; Karoo, by the Orange River, near Prieska, Lichtenstein ! 
Western Recon: Little Namaqualand ; between Koper Berg and Kookfontein 
Drége, 6395 ! 
XLVill. HUERNIA, R. Br. 
Calyx 5-partite. Corolla wholly campanulate or with a short 
tube more or less constricted at its mouth and a very abruptly or 
horizontally spreading limb, 5-lobed, with 5 small teeth alternating 
with the lobes, formed by the projecting sinuses, in one species with 
the teeth and lobes of nearly equal size, both small and tooth-like, 
smooth, papillate or beset with simple or clavate hairs or processes 
on the inner surface. Outer corona spreading upon and more or less 
adnate to the bottom of the corolla-tube, disk-like and 5- or 10-crenate 
or toothed, or the disk with 5 distinct lobes, or the lobes free to the 
base, bifid, emarginate or rarely entire, entirely absent in one species. 
Inner corona arising from the upper part of the staminal column, of 
5 simple lobes incumbent upon the backs of the anthers and equalling 
or exceeding them, subulate or clavate or thickened at the apex, 
often with a slight transverse dorsal ridge at their base, but no 
crest, wing or dorsal horn. Pollen-masses solitary in each anther- 
cell, subhorizontal, pellucid just within the straight margin near the 
free end, attached in pairs by short triangular caudicles to lateral 
wing-like expansions of the pollen-carrier. 
Perennial succulent dwarf plants ; stems leafless, angular, simply toothed or 
sometimes with bristle-pointed teeth along the angles, glabrous ;_ flowers 
solitary or in small clusters near the base or middle of the young stems, of 
moderate size. 
Disrris. Species over 30, one in Arabia, 6 or 7 in Tropical Africa, the 
remainder in South Africa. 
Outer corona none: ,,. oe soe is ... (12) simplex. 
Outer corona well developed : 
inner corona-lobes wholly incumbent upon the anthers 
and not produced beyond their tips into erect 
points ; corolla-limb very abruptly spreading from 
the tube, saucer-shaped, cupular or subhorizontal : 
Corolla very distinctly raised into a broad smooth 
convex ring around the mouth of the tube. 
(See also 20, H. venusta, of which the corona is 
unknown): 
Corolla-lobes marked with transverse purple- 
brown bars and distinctly pubescent or 
_ puberulous on the inner surface oss ... (23) zebrina. 
Corolla-lobes dotted with blood-red and minutely 
pene fe ages the inner surface, but’without —__ 
oe HS os Sarl ae ee ; eee ates ee (17) humilis. 
