Chrozophora. | CXXIJ, EUPHORBIACEE (PRAIN). 839 
Nile Land. Nubia: Dabbeh, Hhrenberg! Bayuda, between Dabbeh and 
Khartoum, Hartmann! Matamma ; near Ssagadi, Schweinfurth, 835! near El Bak, 
between Berber and Suakin, Schweinfurth, 836! 839! without precise locality, 
Rifaud! Kordofan: Bareis on the Darfur frontier, Pfund, 492! near Goghan, 
Broun! and without precise locality, Colston, 87 1 Muriel, 8/106 ! 
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. Pl. iii. 306. 
Flowers moncecious, 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, célls 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-coccous ; 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 Anierican and mainly Brazilian; those here described 
more or less widely cultivatetl 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. Glaziovit. 
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 arubber-plant . : “ . 2. M. piauhyensis. 
Bracts sinall, not longer than the pedicels. 
Lobes of the leaves more or less lobulate ; grown as a : 
rubber-plant’ . : é ‘ 3. M. dichotoma. 
Lobes of the leaves entire; grown asafood-plant . 4. M. utilissima. 
1. M. Glaziovii, Mill. 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, 1#~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 
