Cynanchum. | ASCLEPIADE (Brown). 753 
CrentTRaAL Recton: Aliwal North Div..; by the Orange River near Aliwal North, 
Drege! Burke, 386! Albert Div. ; between the Zuurberg Range and Stormberg 
Spruit, Zeyher, 1155! Stormberg Spruit, Burke, 453! Hopetown Div. ; near 
Hopetown, Muskett in Herb. Bolus, 2566 ! 
KaaHart Recion: Orange River Colony, Hutton! Mrs. Barber! Transvaal ; 
near Pretoria, Schlechter, 4149! Conrath, 1057! Irene, Miss Leendertz, 673 ! 
11. C. schistoglossum (Schlechter in Journ. Bot. 1895, 271); 
stem twining, minutely pubescent, becoming glabrous ; leaves thin, 
spreading ; petiole }—1} in. long, slender, puberulous along the channel 
on the upper side ; blade 1-3} in. long, 4-12 in. broad, elongate- 
oblong or oblong-ovate, acute or acuminate, varying from subtruncate 
_to deeply cordate at the base, with rounded basal lobes, glabrous or 
with a sparse pubescence on both sides ; cymes lateral at the nodes, 
umbel-like or the axis elongating with age into a short raceme, 
pedunculate or subsessile, 5- to many-flowered ; peduncles 1-8 lin. 
long, puberulous ; pedicels 1-4 lin. long, puberulous ; sepals }—# lin. 
long, ovate, acute or acuminate, puberulous ; corolla 14-2 lin. in 
diam. ; lobes ascending-spreading, 3 to nearly 1 lin. long, ovate or 
oblong, subacute, glabrous, green (Schlechter); corona arising from 
the base of the staminal column and equalling or shortly exceeding 
it, }-3 lin. long, cup-shaped, white, very variable in toothing and 
lobing, usually with 5 entire or bifid teeth from a broad base, with 
or without 5 minute teeth alternating with them, but sometimes 
with 5 pairs of filiform teeth, sometimes divided to the base into 5 
cuneately subquadrate lobes alternating with the anthers, produced 
at the apical angles into teeth and entire or denticulate between 
them ; usually there are 2 slight keels within opposite each of the 
principal teeth, or when divided into quadrate lobes there is a keel 
near each margin, but in some flowers the keels seem absent or are 
obliterated in the process of drying ; staminal column not exceeding 
the corona, not stipitate ; anther-appendages suborbicular, inflexed 
over the style-apex, which has a minute central projection. 
- Schlechter in Journ. Bot. 1896, 457; N. E. Br. in Dyer, Fl. Trop. 
Afr. iv. i. 395; Hiern in Cat. Afr. Pl. Welw. i. 688. ©. vagum, N. E. 
Br., and C. brevidens and var. zambesiacum, N. E. Br. in Kew 
Bulletin, 1895, 257. ©. minutiflorum, K. Schum. in Engl. and 
Prantl, Pflanzenfam. iv. ii. 252, and in Bull. Soc. Bot. Belg. 
xxxvii. 123. 
Eastern Region: Natal; near Phoenix, Schlechter, 7090! 7804! Inanda, 
Wood, 611 (not 611 from near Durban)! near Umhlanga River, Wood, 5664! and 
without precise locality, Gerrard, 1306! 
Also in Tropical Africa. 
As I have stated in the Flora of Tropical Africa, this is one of the most 
variable Asclepiads (as to its coronal structure) that I have examined. But the 
few Natal specimens I have seen usually have the corona as detailed in the first 
part of the above description, yet as I have found this form of corona and one or 
more variations of it upon the same individual among the Tropical African 
specimens, I have included the chief variations in the above description, as they 
are not unlikely to occur upon South African examples. 
VOL. IV.—SECT. I.—PART V. 3C 
