FLORA NIGRITIANA. 465 
3. Batatas. pentaphylla, Chois. in DC., Prod. 9. p. 889.— 
St. Thomas, Don; a common Tropical species in both hemi- 
spheres, 
The common Batata, Batatas edulis, Chois., is said to be 
cultivated in Tropical Africa, as well as in India and America ; 
but the cultivated specimens, brought by Vogel, certainly 
belong to the B. paniculata. 
l. Pharbitis Nil, Chois. in DC. Prod. 9. p. 343.—On the 
Quorra, Vogel; a common Tropical plant. 
k Calonyction speciosum, Chois. in DC. Prod. 9. p. 345, pro 
parte.—Ipomcea bona-nox, Linn. var ?— Chonemorpha con- 
volvuloides, G. Don, Gard. Dict. 4. p. 76.—Abdh, Vogel ; 
St. Thomas, Don. 
The confusion of characters and synonyms accumulated 
under the name of Calonyction speciosum is so great, that it is 
difficult to find any specimen agreeing both with the generic 
and specific characters given, The original Ipomea bona-nox, 
Linn, has the outer sepals (exclusively of their long points) 
much shorter than the inner ones, which are either blunt or 
have very short points; the corolla is rather hypocrateriform 
than infundibuliform, with a slender green tube, 4 or 5 inches 
long, and an almost flat, broad-spreading, white limb; the 
stamens project considerably beyond the mouth of the tube, 
and the capsule is as large as a good-sized nut. In these 
respects, the Asiatic and American plants appear to agree; 
unless it be that the corolla is rather larger in the American 
ne. Our African specimens have the calyx and corolla of the 
Same form and colour, but smaller, and the stamens are 
scarcely, if at all, longer than the tube of the corolla. The 
Tpomea muricata, Roxb., of which the calyx could with less 
impropriety be said to be * sepalis aristatis zequalibus," and the 
corolla *infundibuliformis," has already been shown to be 
totally distinct from the bona-noz, not only by this form of the 
calyx and corolla, but also by the colour of the latter, the tube 
of which is of a deep purple, by the stamens always included, 
and by the small fruit. It is a true Tpomea, and so ìs the 
lpomwa acanthocarpa, Hochst. (Calonyction? Chois.) from 
H H 
