93 
catchment-areas of the Senegal River, the Niger -Benue basin, the 
dvainage area of Lake Chad, the Nile basin, and again in the 
catchment-areas of the Zambesi and the Lim mpopo. “It has not 
yet been reported trom any ages in the Congo basin or in that 
of the Cunene or the Orange Riv 
Three very easily age varieties may be recognised. 
a. typica, Prain, (1912). Prostrata; folia caulina saepis- 
slime longiora quam fie margine undulata ; pedunculi perbreves 
saeplus versus basin foliiferi.—Croton tinctorium, Forsk. FI. 
Aegypt.-Arab. Cat. Aegypt. n. 490, p. lxxv. et (dubitanter) Cent. 
vi. p. 162 (1775), nec Linn. Croton plicatum, Vahl, Symb. Bot. 
p-. 78 (1790); Willd. Sp. Pl. iv. 1, p. 538 partim (1805) quoad 
syn. Vahl tantum; Geis. Crot. Monogr. (plicatus) p. 70 (1807), 
syn. Lamk et Burm. f. omnino syn. Vahl pro parte maxima excl. ; 
A. Juss. Tent. Gen. Euph. p. 28 (1824). Chrozophora plicata, 
A. Rich. Tent. Fl. Abyssin. 11. p. 252 (1851) excl. syn. Burm. f. ; 
p. 67, partim (1860) ; Boiss. Fl. Orient. iv. p. 1140 partim (1879) 
Engl. Hochgebirgesfl. Trop. Afr. p. 283 partim Sue a: in 
Istit. Bot. Roma, vi. p. 183 (1895); Broun, Cat. es 
p. 72 (1906); Pax et K. Hoffm. in En gl. Pflanzenr. V. 147. 5 
p. 19 partim (1912). C. obliqua, Schweinf. Pl. quaed. Nilot. . 
10, t. 3 (1862), et in Beitr. Fl, Aethio p p- 99 (1867), non A. Juss. 
i noe 3 c 
in Trans. Linn. Soc. xxix. p. 146 (1875); Aschers. et Suh eelat. 
Ill. Fl. Egypt. : a (1887); Schweinf. in Bull. Herb. Boiss. vii. 
App. 2, p. 806 (1899). C. prostrata, Schweinf. Beitr. Fl. Aethiop. 
pp. 235, P9362 (1867), non Dalz. 
Seneca, River Basty. Senegal: Dagana, Lepriewr! Podar, 
Mathieu! 
Nicer-Benve Basry. Cameroon: Garua, on sandbanks in the 
bed of the River Benue, Ledermann, 3239! 
Laxe Cuap Basty. Northern Nigeria: Bornou; Kuka, near 
Lake Chad, Vogel, 32! French Congo: Kusseri, on the River 
Shari, Foureau, 3006! 
Nite-tanp. Sudan: banks of the Nile; at about 16° N. Lat., 
Speke & Grant! Nuer; on the White Nile, Brownall! at Geitena, 
Schweinfurth, 898! Sennar: Abu Sugra, Schweinfurth | Wolet 
Medine, Kotschy, 473 partly! Kordofan, Colston, 52! 63! Salati, 
lue Nile, Muriel, S/37! Abyssinia : Goelleb, 
' 1694! Amhara; Jenda, Steudner, 533! 
by the Tacazza River, Petit! Quartin-Dillon § Petit, 213! Weg 
Sch not seen}. Nu 
Ri eer Tratan tapes : arr Courbon, 438! nbn orn- 
miller, 10949! Lower Egypt: Giz orskal! n ai 
izeh, Ff ro, 
! near 
Ehrenberg! Schweinfurth, 137! Wichura, 3075 ! Pfund! ne 
Shales Alley; SScanhennt between Cairo and Roman toh, 
