FLORA NIGRITIANA. 305 
A second species, 4. rugosus, DC., to which probably belong 
also Hedysarum rugosum and H. ovalifolium, Schum. et 
Thonn., is a native of Senegal and Guinea, extending to Cor- 
dofan. f 
Of the genus Abrus, which connects Viciee with Phaseolee, 
one species, the common A. precatorius, is included in the 
Senegambian Flora. It is found abundantly within the Tropics, 
both in the New and the Old World, but in many places evidently 
introduced. 
1. Centrosema decumbens, Mart.—Benth. in Ann. Mus. Vind. 
2. p. 120.—Cape Coast, Vogel.—A common South American 
plant, ranging from the West Indies to South Brazil. The 
genus is also, with this exception, exclusively American. 
Clitoria Ternatea, a common East Indian plant, introduced 
into many parts of America, is found also in Senegambia, and 
over a great portion of Tropical Africa. 
1. Glycine labialis, Linn.— Wight et Arn. Prod. Penins. Ind. 
Or. 1. p. 200.—St. Thomas, Don.—A common Tropical plant, 
both in the New and the Old World. 
The G. Senegalensis, DC., is generally supposed to be a mere 
variety of G. parviflora, Lam., (which latter is correctly referred 
to G. labialis) ; but some specimens in Heudelot’s Senegambian 
collection, agreeing well with De Candolle’s character, are 
certainly distinct. Besides the longer racemes, and longer and 
smoother pods, the calyx is essentially different, being divided 
into four instead of five teeth, and each tooth is broader. Hoch- 
stetter’s Kennedya Arabica, from Cordofan, appears to be the 
same as the Senegambian plant. 
l; Johnia Willdenowii, Hook. fil.—Glycine hedysaroides, Willd. 
Spec. 3. p. 1060.—Acera, Don ; in Vogels collection without 
the precise locality. 
This species, well described by Thonning under Willdenow’s 
name, is certainly congener to the Johnia Wightii, Arn., and to 
the Bujacia anonychia, E. Mey., which is scarcely specifically 
distinct from the Indian plant. In all I find the stamens mo- 
nadelphous, and all bearing anthers, the upper stamen being 
free only at the base. In the Johnia vestita, Am., however, 
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