Olaoxylon.] OXXI, EUPHORBIACEH (PRAIN). 875 
nerves 8-9 pairs, ascending, raised beneath ; petiole at first sparsely 
pubescent, soon glabrous, 1$-24 in. long; stipules very minute. 
Flowers in axillary spike-like racemes, 6-8 in. long; racemes peduncled ; 
peduncles 1 in. long and rhachis closely adpressed-puberulous ; bracteoles 
ovate-deltoid, each subtending a fascicle of 5-11 flowers ; fascicles at 
first close set, at length }-4 in. apart above and }-} in. apart below ; 
pedicels puberulous, at length #-} in. long. Male calyx whitish-green, 
puberulous, ovoid in bud; lobes 4, divided nearly to the base. Stamens 
11-12, outer 8, the rest central ; filaments short, surrounded by a ring 
of glands completely connate in an entire extra-staminal cup, hirsute 
on the margin with short white hairs; inter-staminal glands 0. 
ea flowers and fruit not seen.—Miill. Arg. in DO. Prodr. xv. 
u. 779, 
Upper Guinea. Fernando Po; Mann! 
2. C. occidentale, Mill. Arg. in Flora, 1864, 438. Small tree, 
80 ft. high; twigs glabrous, purplish. Leaves distinctly petioled, 
membranous, ovate-oblong, shortly and obtusely cuspidate, base rather 
wide-cuneate, margin shortly closely glandular-crenate, 6-12 in. long, 
3-9 in. wide, medium green, purple when young and tinged with 
purple when mature, rather paler beneath, glabrous; lateral nerves 
8-9 pairs, ascending, raised beneath ; petiole glabrous, 14-24 in. long ; 
stipules very minute, Flowers in axillary spike-like racemes, 6-8 in. 
long ; racemes peduncled ; peduncles 1 in. long and rhachis, glabrous ; 
bracteoles triangular, cuspidate, each subtending a fascicle of 3-5 
flowers ; fascicles at first close-set, at length ,,-} in. apart above, 
- $-§ in. apart below ; pedicels pubescent, ;4-;'5 in. long. Male calyx 
purplish-green, densely pubescent, globose in bud; lobes 4, divided 
nearly tothe base. Stamens 11-12, outer 8, the rest central ; filaments 
short, surrounded by a ring of glands partially connate in a very shallow 
many-lobed extra-staminal cup, the lobes hirsute at the apex with short 
white hairs; inter-staminal glands 0. Female flowers and fruit not 
seen.—Miill. Arg. in DC. Prodr. xv. ii. 779. 
Lower Guinea. St. Thomas Island: St. Thomas Peak, up to 7000 ft., 
Mann, 1064! Welwitsch, 442! Chevalier, 13666! Quintas, 163! 
3. C. hexandrum, Mill. Arg. in Flora, 1864, 438. Small tree 
10-35 ft. high, twigs glabrous, pale green. Leaves long-petioled, 
membranous, oblong or oblong-lanceolate, acute or obtuse, base cuneate, 
margin closely and shortly or occasionally distinctly glandular-toothed, 
7-15 in. long, 3-6 in. wide, rather dark green, paler and finely verrucose 
beneath, petioles (but not the blades) purplish when young, glabrous ; 
lateral nerves 8-12 pairs, rather spreading, raised beneath; petiole 
glabrous, 1-1} in. long near the apices of the twigs, 23-6 in. (occasionally 
12 in.) long on the branches below ; stipules very minute. Flowers in 
axillary spike-like racemes, 8-20 in. long ; racemes peduncled ; peduncles 
4-1} in. long and rhachis closely and softly adpressed-pubescent ; 
bracteoles ovate, cuspidate, densely pubescent, each subtending a fascicle 
of 3-7 male flowers or a solitary female flower; fascicles at first close 
