744 OXXII. EUPHORBIACEA (HUTCHINSON). | Hevea. 
base, 3-8 in. long, 1-3 in. broad, entire, membranous or thinly charta- 
ceous, glabrous on both surfaces, often somewhat glaucous below ; lateral 
nerves about 20 on each side of the midrib, looped quite close to the 
margin, distinct on both surfaces, prominent below ; tertiary nerves. 
parallel, numerous, prominent on both surfaces; stalks of the leaflets. 
2-7 lin. long, each provided at the base with a large flat orbicular gland, 
_the glands often contiguous or almost merged into one ; petiole 24-9 in. 
long, faintly longitudinally suleate, with a narrow groove on the upper 
side, glabrous. Panicles several below the tufts of leaves on each young 
shoot, 3-5} in. long; axis slightly pubescent or glabrous, more or less 
angular or sulcate; lateral branchlets up to 24 in. long, terminating in a 
solitary pedicellate female flower, the remaining lateral flowers all ale. 
Male flowers numerous, shortly pedicellate: Buds ovoid, acuminate, 
tomentellous, about 12 lin. long just before opening. Calyx-lobes 9, 
narrowly lanceolate, acuminate, subacute, about } lin. long, tomentel- 
lous on both sides. Disk small, pubescent. Anthers 10, in two series 
of 5 each on the column; column obtuse, pubescent. Female pedicel 
about 2 lin. long, thickened upwards towards the base of the flower. 
Buds ellipsoid, narrowed to the base, acuminate to the apex, 14-2 lin. 
long, densely puberulous. Calyx-tube about 1 lin. long, puberulous 
outside, nearly glabrous within; lobes narrowly lanceolate, tapered to 
an acute apex, 2-24 lin. long, densely puberulous or almost tomentel- 
lous on both surfaces. Ovary triangular-ovoid, sulcate, tomentellous ; 
stigmas 3, sessile or subsessile, suborbicular, glabrous. Capsule 3-lobed, 
about 13 in. in diam.; lobes about 1 in. broad, slightly keeled. Seeds 
broadly oblong or oblong-ellipsoid, about 1 in. long and # in. broad ; testa 
mottled and speckled, slightly shining.—Miill. Arg. in DC. Prodr. xv- 
ii. 718, in Collins, Caout. 1, and in Fl. Bras. xi. ii. 302 ; Engl. Pfl. Ost- 
Afr. B. 440; Kohler, Mediz. Pf. iii. with fig.; Der Tropenpflanzer, 
1898, 271, with fig.; 1905, Beih. No. 1, 7 and 23, with figs.; Hemsl. 
in Hook, Ie. Pl, xxyi. t. 2573, tigs. 1-7; Bull. Econ. Indo-Chine, 1909, 
690, 691, 693, with figs.; Yves Henry, Caoutch. Afr. Occ. Fr. 197, with 
fig.; Huber in Bol. Mus. Goeldi, Para, iv. 637; Pax in Engl. Pilanzenr- 
Euphorb.-Jatroph, 121. H. janeirensis, Miill. Arg. in Fl. Bras. XL 
ii. 706.  Siphonia brasiliensis, Kunth. in Humb. & Bonpl. Nov- 
Gen. et Sp. Pl. vii. 171; Jussieu, Euph. t. 12, fig. 38, B; Klotzsch 10 
Hayne, Arzneik. xiv. t. 5; Benth. in Hook. Kew Journ. Bot. 1854, 369. 
S. kunthiana, Baill. Etude Gén. Euph. 326. 
Native of Brazil ; cultivated in various parts of Africa. 
37. RICINODENDRON, Miill. Arg.; Benth. et Hook. 
f. Gen. PI. iii. 297. 
Flowers dicecious. Petals present. Male flowers: Calyx subglobose ; 
segments 5, imbricate, unequal. Petals connate into a‘5-lobed tube. 
Disk-glands 5, large, erect, more or less ovate. Stamens 10-16; fila- 
ments central, free, often hairy at the base; anthers oblong, dorsifixed ; 
cells parallel, dehiscing longitudinally. Rudimentary ovary absent. 
Female flowers: Sepals and petals as in the male. Disk saucer-shaped, 
