FLORA NIGRITIANA. 221 
X. VIOLARLE. 
l. Tonidium thesiifolium, DC. Prod. 1. p. 309.—I. rhabdo- 
spermum, Hochst. in Herb. Un. Itin.—Senegal, Heudelot ; 
Accra, Vogel, Don. 
Var. 8. chenopodiifolia, Guill. et Perr.—Senegal, Heudelot ; 
Cape Coast, Don. Also a native of Upper Egypt. 
2. lonidium suffruticosum, Ging. in DC. Prod. 1. p. 811.— 
Accra, Vogel, Don. 
A protean plant, and probably only a large var. of the pre- 
ceding, owing its stature to the more humid atmosphere of the 
Bight of Benin. J. linifolium, DC., is probably another variety, 
as well as 7. enneaspermum, Vent.; and Viola Guineensis and 
V. lanceifolia, Schum. et Thonn. The species has a very wide 
range, extending through Nubia and Upper Egypt to Eastern 
Tropical Africa, Madagascar, East India and Tropical Australia. 
Some American species are hardly to be distinguished from 
the African, except by their smooth, not striated seeds.* The 
two Oware species of Ceranthera, described by Palisot de 
Beauvois, and two other Senegal ones (in Herb. Hook.) com- 
plete the small catalogue of known W. African Violarie. 
XI. SAUVAGESIACEJE. 
l. Sauvagesia erecta, Linn.— Sierra Leone, Vogel, Don ; Senegal, 
and abundant throughout Tropical America. 
XII. POLYGALEZ. 
l. Polygala arenaria, Willd. Sp. 3. p. 880.—On the Quorra, 
Vogel and Ansell; Guinea. 
Allied to the P. Vahliana (of East India), but the foliage is 
Very different. Flowers about 20, deflexed, densely imbricated 
into a sort of strobilus. 
* This appears, however, to be a constant, and therefore important 
character.—(G. B.) 
