466 FLORA NIGRITIANA. 
Nubia. The genus Calonyction, if retained at all, should pro- 
bably be confined to C. speciosum and grandiflorum, unless 
perhaps some of Choisy's Zzogonia be added to them. 
1. Ipomoea reptans, Poir., Chois. in DC. Prod. 9. p. 849.—0n 
the Quorra, among the ruins of Addanda, Vogel. 
This is a very luxuriant form, with leaves on very long 
petioles, and often 5 inches long, and 3 broad at the base. 
2. Ipomea pes-capre, Sw.—Chois. in DC. Prod. 9. p. 349.— 
Cape Palmas and Fernando Po, Vogel; common on this as 
on other Tropical sea coasts. 
The 7. asarifolia, Roem. et Schult., a species closely allied to 
the Asiatic I. rugosa and to the American J. urbica, is indicated 
as a Senegal plant. I have not seen any specimens of it, but m 
the Hookerian Herbarium is one, apparently of rugosa, 8% 
thered by Macrae, at St. Yago (Cape de Verd Isles),* but remark- 
able for its peduncles, which are rather longer than usual, and 
thickly covered near the base with a rusty pubescence. The 
I. Clappertoni, Br., from Central Africa, belonging to the same 
group, is unknown to me. 
3. Ipomeea filicaulis, Bl.—Chois. in DC. Prod. 9. p. 353.— 
Along the whole Guinea Coast to the Niger and St. Thomas, 
Vogel, Don ; common in Tropical countries. 
4. Ipomæa ovalifolia, Chois. in DC. Prod. 9. p. 857.—Acct 
Vogel, Don ; Guinea, Angola and East India. 
To the same group Choisy refers two Angola species, T. den- 
droidea, Chois., and I. verbascoidea, Chois. 
5. Ipomeea involucrata, Beauv.— Chois. in DC. Prod. 9. p. 969. 
— Sierra Leone, Don, Miss Turner; Cape Palmas, Vogel ; 
Senegal to Oware, also Madagascar and Java, according to 
Choisy.—Var. Airsutior, Fernando Po, Vogel. 
This species can scarcely be distinguished from the common 
East Indian Z. pileata. 
6. Ipomea amena, Chois. in DC. Prod. 9. p. 365.—Savannahs 
* This species has to be added to the Spicilegia Gorgonea (supra, 
_ p.152), where also the reference, under I. pes-capre, to the figure 
T. maritima, should be to the Bot. Reg. t. 319, not Bot. Mag.; a mistake 
apparently copied from the Prodromus. 
