396 LXXXV. ASCLEPIADEZ (BROWN). [ Cynanchum. 
with rounded basal lobes, glabrous or with a sparse pubescence on both 
sides. Cymes umbel-like, more or less elongating into short racemes as 
the flowers develop, sublateral, pedunculate or subsessile, many- 
flowered ; peduncles 1-4 lin. long, pubescent; pedicels 1-4 lin. long, 
pubescent. Sepals 3—} lin. long, ovate, acute or acuminate, pubescent, 
ciliate. Corolla 1}—2 lin. in diam., rotate or rotate-campanulate, white 
(Hens), glabrous ; lobes 3—} lin. long, ovate or ovate-oblong, subacute. 
Corona arising from the base of the staminal-column and about equal- 
ling or slightly longer than it, about 4-2 lin. long, erect, cup-shaped, 
exceedingly variable in toothing and cutting; sometimes very shortly 
5-toothed ; sometimes with 5 moderately long teeth of variable form, 
entire or bifid at the apex, having 5 minute teeth alternating with 
them; sometimes with 10 filiform teeth in 5 pairs, each pair alterna- 
ting with 3 minute teeth; sometimes divided nearly to the base into 9 
cuneately-quadrate lobes alternating with the anthers, produced at the 
apical angles into shorter or longer teeth and entire or denticulate 
between them ; two or more variations often occur on the same speci- 
men ; usually, but not always, there are 2 slight keels within, opposite 
each of the 5 principal teeth, or when the corona is divided into quad- 
rate lobes there is a slight keel near each margin. Staminal-column 
not exceeding the corona ; anther-appendages orbicular, inflexed over the 
truncate or dome-shaped apex of the style.— Hiern in Cat. Afr. Pl. Welw. 
i. 688. C. vagum, N. E. Br., and C. brevidens and var. zambesiacum, 
N.E. Br. in Kew Bulletin, 1895, 257. @. minutiflorum, K. Schum. in Engl. 
& Prantl, Pflanzenfam. iv. ii. 252, and in Bull. Soc. Bot. Belg. xxxvii. 123. 
Lower Guinea. Lower Congo: Stanley Pool, 900 ft., Hens, B, 77! new 
Dolo, Schlechter, 12484 (ex Schlechter) ; Congo, Burton! Angola: Golungo 
Alto ; thickets at the base of the mountains of Alto Queta, Welwitsch, 4243! Ponte 
de Felix Simoes, Welwitsch, 4241! and without precise locality, Welwitsch, 5949 ! 
Huilla ; damp thickets near Lopollo, Welwitsch, 4251! 
Mozamb. Dist. Portuguese East Africa: Expedition Island, in the Lower 
Zambesi, Kirk! British Central Africa: Nyasaland; between Kondowe and 
Karonga, 2000-6000 ft., Whyte ! 
Also in Natal. 
This is one of the most variable Asclepiads, as to its coronal structure, that I 
have examined, and when I described C. vagum and C. brebidens, I had no idea that 
two such dissimilar coronas could belong to the same plant ; on subsequently received 
specimens, however, I found both forms of corona and some other modifications as 
well on the same specimen. Usually, within very slight limits of variation, the 
corona of each species is very constant in its form. 
9. C. altiscandens, K. Schum. in Engl. Pf. Ost-Afr. C. 324. 
Stem twining, slender, pubescent with spreading hairs, or the youngest 
parts minutely puberulous, soon becoming glabrous. Leaves spreading, 
less thin than in many species; petiole 2-9 lin. long; blade 4-2} in. 
long, 4-1} in. broad, ovate, elliptic-ovate, oblong-ovate or oblong, 
acute or obtuse, shortly cuspidate or acuminate, rounded or rarely 
emarginate at the base, pubescent or glabrous on both sides. Cymes 
lateral at the nodes, umbel-like, at length very shortly racemose, 
pedunculate, many-flowered ; peduncles 14-3 lin. long, pubescent, 
