842 CXXII, EUPHORBIACE# (PRAIN). [ Manchot. 
Gold Coast, 1908, 24 (precosa); Thomps. Rep. For. Gold Coast, 1910, 12 
(precosa); Kew Bulletin, 1910, 96. 
Native of Brazil, rather widely cultivated as a rubber plant in Tropical Africa. 
The Jequié Rubber or Jequié Manigoba. 
As figured by Hemsley, the leaves in seedlings of this species are peltate as in 
M. Glaziovii. 
4. M. utilissima, Pohl, Pl. Bras. Ic. et Descr. i. 32, ¢, 24. Shrub, 
6-10 ft. high, twigs glabrous; root tuberous, 8 ft. long, 6-9 in. thick, 
weighing 5-25 lbs., bitter and charged with a noxious juice or sweet 
and harmless. Leaves long-petioled, membranous, the uppermost some- 
times entire, ovate, acutely acuminate, rounded at the base, 4 in. long, 
1} in. wide, downwards progressively 3—7-lobed almost to the base, 
rather broader than long, the largest reaching 10-12 in. in width; lobes 
linear-lanceolate, acutely acuminate, the central rather the largest, nar- 
rowed to the base, and there confluent in a small web 3-3 in. across, 
each 3-7 in. long, {-14 in. wide, tawny green above, glaucous beneath, 
glabrous on both sides or more or less pubescent especially on the main 
nerves near the base and especially beneath; petiole 23-10 in. long, 
glabrous or faintly puberulous near the apex, green or purplish like the 
main nerves; stipules triangular-lanceolate, acuminate, puberulous, 2-3 
lin. long. Racemes lax, few-flowered, from the upper axils ; peduncle: 
slender, sometimes clustered, up to 2 in. long; bracts small, linear- 
lanceolate, entire, deciduous ; male pedicels 2-8 lin. long, female pedicels 
spreading, up to 1 in. long. Calyx dirty yellow, campanulate, glabrous 
and pruinose outside, puberulous within near the apex, 5-lobed beyond 
the middle, male 2-23 lin. long, female 5 lin. long. Stamens 10; 
anthers small, with hairy tips. Disk glabrous. Ovary glabrous, nar- 
rowly 6-winged. Capsule % in. long, wide ellipsoid, rugulose, witlt 
undulate almost crenate wings. Seeds ellipsoid, compressed, peti ’ 
in. long.—Bentl. and Trim. Med. Pl. t. 235; Miill. Arg. in DC. Prodr. 
xv. ii. 1064, and in Mart. Fl Bras. xi. ii. 457, t. 65; Oliv. in Trans. 
Linn. Soc. xxix. 148; Ficalho, Pl. Uteis, 251; Pax in Engl. PA. Ost- 
Afr. C.240; Durand & Schinz, Etudes Fl. Congo, 244; Hiern in Cat. 
Afr. Pl. Welw. i. 973; De Wild. Miss. FE. Laurent, 140, and he via 
Fl. Bas- et Moyen-Congo, ii. 287 ; Dawe, Miss. Bot. Uganda, 56 ; eer 
in Johnston, Liberia, ii. 649; Th. & Hél. Durand, Syll. FI. ween : 
490; De Wild. Comp. Kasai, 338; Pax in Engl. Pflanzenr. Kup! rir 
Adrian. 67. M. palmata, var. Aipi, Stapf in Joleen ii. ¢ ri 
hardly of Mill. Arg. Jatropha Manihot, Linn. Sp. PI. ed. i. 1007. /anwp 
Manihot, H. B. & K. Nov. Gen. et Sp. ii. 108; Bot. Mag. t. 8071. 
Native of Brazil, widely cultivated, in many races, throughout Tropical Africa, - 
the sake of the flour of its tuberous root. aa t. from 
The numerous recognisable races of the Cassava vary in size pe gregg 
2-3 ft. up to9-10 ft. high; in colour of bark, from green or yellowis ‘olet ; in 
brown or chestnut-brown; in tint of foliage from pale green to veap A: and in 
uature of root, from sweet te bitter, with in each case intermediate porcine ‘li 
most instances various combinations of the features mentioned. In pre welative 
numerous races which differ among themselves by what may se a wel have 
characters, there are two striking African forms, no counterparts of W 
