Chrozophora.'] cxxii. KUPHORBiACEiE (prain). 889 



Wile Ziand. Nubia: Dabbeh, Ehrenherg ! Bayuda, between Dabbeh and 

 Khartoum, Harfmann ! Matamma ; near Ssagadi, Schweinfurth, 835 ! near El Bak 

 between Berber and Suakin, Schweinfurth, 836! 8391 without precise locality,' 

 Rifaud ! Kordof nn : Bareis on the Darf ur frontier, Pfund, 492 ! near Goghan,' 

 Broun ! and without precise locality, Colston, 87 ! Muriel, S/106 ! 



This species can only be separated with difficulty from C. senegalensis. Lam., the 

 typical form passing insensibly into C. senegalensis on the one hand and into its 

 variety Hartmanni on the other, while var. Hartmanni further passes insensibly into 

 C. senegalensis, var. lanigera. 



51. MANIHOT, Adans.; Benth. et Hook. f. Gen. PI. iii. 306. 



Flowers monoecious, apetalous, usually rather large. Male : Calyx 

 often coloured, campanulate, 5-lobed ; lobes short or long, imbricate or 

 contorted. Stamens 10, 2-seriate, attached between the lobes or glands 

 of the disk ; filaments free, slender ; anthers dorsifixed, cells parallel, 

 opening longitudinally. Rudimentary ovary minute or 0. Female: 

 Calyx as in the male. Ovary 3-celled ; styles shortly connate below, 

 variously dilated or lobed above; ovules solitary in each cell. Disk 

 entire or lobed or glandular. Capsule 3-coccou8 ; cocci 2-valved. Seeds 

 carunculate, ovoid or oblong ; testa crustaceous ; albumen fleshy ; coty- 

 ledons broad, flat. — Shrubs or sometimes trees, rarely herbs, often more 

 or less glaucescent or pruinose. Leaves alternate, usually petioled, 

 palmately lobed, less often entire, sometimes peltate ; stipules usually 

 small. Flowers in terminal or subterminal racemes or panicles, with 

 the upper flowers male, and a solitary or few females towards the base ; 

 bracts sometimes small, sometimes large, leafy, entire or lacinulate. 



Species about 130, all American and mainly Brazilian; those here described 

 more or less widely cultivated economically in the tropics of the Old World. 

 Fruits without wings or ridges ; bracts small ; leaves 



peltate even in fully grown plants; rubber producing. 1. M. Glaziovii. 

 Fruits with six distinct wings or ridges ; leaves not peltate, 

 at least in fully grown plants. 

 Bracts large and leafy, at first concealing the flowers; 



grown as a rubber-plant . . . . .2. M. piauhyensi*. 



Bracts small, not longer than the pedicels. 



Lobes of the leaves more or less lobulate ; grown as a 



rubber-plant . . . . . . . 3. Jf. diohotoma. 



Lobes of the leaves entire ; grown as a food-plant . 4. M. utilissima. 



1. M. Glaziovii, MioU, Arg. in Mart. Fl. Bras. xi. ii. 446. Tree 

 30-50 ft. high ; twigs glabrous ; stems yielding rubber. Leaves long- 

 petioled, membranous, peltate, some of the uppermost occasionally 

 entire, the other palmately 3-5- (rarely 7-) lobed, 5-6 in. long, when 

 entire 3 in., when lobed 6-8 in. wide ; lobes oblong-ovate or elliptic, 

 shortly acute or acuminate, minutely mucronulate, separated by narrow 

 acute sinuses, their margins entire, the basal pair almost horizontal, 

 central largest lobe about 4 in. long, l|-2 in. wide, rather deep bluish- 

 green above, paler and often glaucescent or glaucous beneath, glabrous 

 or both sides or sometimes with a tuft of hairs opposite the tip of the 



