FLORA NIGRITIANA. 341 
5. Combretum sericeum, Don.—DC. Prod. 3. p. 21.—C. her- 
baceum, Don, l. c.—Sierra Leone, Don. 
Stems herbaceous, simple, a foot, or a foot and a half high, 
proceeding from a woody trunk, approaching in that respect to 
the habit of the East Indian C. nanum. The flowers are gene- 
rally tetramerous, but probably sometimes pentamercus, as 
Don places the species in the decandrous division of the genus, 
and I have occasionally seen one of the petals much broader 
than the other, or even divided into two, with a very small 
calycine tooth between the two; but I have never observed more 
than eight stamens. : 
Besides the above species, nine Combreta have been described 
from W. Tropical Africa, viz.: C. mucronatum, Thonn., from 
Senegal and Guinea, from which however must be excluded 
C. intermedium, Don, which is a mere variety of Poivrea co- 
mosa ; C. micranthum, Don, from Senegal and Sierra Leone; 
C. paniculatum, Vent., from Senegal, which is certainly distinct 
from Poivrea comosa, referred to it by Guillemin and Perrottet; 
C. altum, Perr. ; C. glutinosum, Perr. ; C. chrysophyllum, Guill. 
et Perr., and C. nigricans, Lepr., all from Senegal; C. tomen- 
tosum, Don, from Sierra Leone; and C. macrocarpon, Beauv., 
from Oware. 
l. Quisqualis ebracteata, Pal. de Beauv.— DC. Prod. 3. p. 23. 
—Q. obovata, Schum. et Thonn. Beskr. p. 218.—On the 
Quorra, Vogel ; Senegal and Guinea. f t 
XLIX. RuizoPHOREX. 
l. Rhizophora Mangle, Linn.—DC. Prod. 8. p. 82.—8ene- 
gambian coast, Don, and others. 
2. Rhizophora racemosa, Mey.—DC. Prod. 3. p. 32.—Sierra 
Leone and Grand Bassa, Vogel ; Guinea Coast, Herb. Hook. 
Both these are American species, at least as far as the speci- 
mens show, I can detect no differences. The Asiatic species, 
some of which are found on the eastern coasts of Africa do not 
appear any of them to have spread to the western coast. — 
l. Cassipourea Africana, Benth.; glabra, foliis obovali-ellipticis 
oblongisve apice rotundatis vel brevissime obtuseque aeumi- 
