Manihot. | CXXII. EUPHORBIACE® (PRAIN). 841 
the middle to the junction with the petiole, margin entire, central largest 
lobe 4 in. long, 2 in. wide, dark green and glabrous above, paler and rusty- 
pubescent beneath ; petiole reddish, pruinose, 4-44 in. long; stipules 
setaceous, tawny-tomentose, deciduous. Racemes elongated, up to 10 in. 
long, from the forks of the younger twigs; bracts foliaceous, glabrous, 
ovate, acuminate, over 1 in. long; bracteoles similar, but smaller, about 
3 in. long; pedicels of males over 1 in. long, of females 2 in. long or 
longer, thickened in fruit ; flowers ascending, those at the base female, 
males more numerous and higher up. Calyx 1 in. long or rather less, 
glabrous outside and within, tubular-cylindric, the male 5-sect nearly to 
the middle, the female 5-sect rather beyond the middle. Stamens 10; 
filaments glabrous; anthers glabrous. Ovary puberulous or glabrous, 
ovoid, 6-keeled. Disk glabrous. Capsule ovoid-globose, distinctly 
6-winged, 14-2 in. long, about as wide. Seed suborbicular, compressed, 
about 4 in. wide.—Kew Bulletin, 1908, 64; Pax in Engl. Pflanzenr. 
Euphorb.-Adrian. 34, fig. 11, C-H, fig. 15, C-E. M. Glaziovii, var. 
piauhy, Pobég. Ess. Fl. Guin. Fr. 353. 
Native of Brazil, rather widely cultivated as a rubber-plant in Tropical Africa. 
The Piauhy Rubber or Piauhy Manigoba. 
M.. Teissonierii, Chev. in Journ. Agric. Trop. vii. 357 (1907), a Brazilian 
caoutchouc-yielding plant, cultivated in French West Africa, agrees in all other 
characters with 1, piauhyensis, but differs in having an indehiscent fruit. On 
account of this difference the plant has since been treated as the type of a distinct 
genus Hotnima, Chey. in Journ. Agric. Trop. viii. 111 (1908), with a single species, 
H. Teissonierii, Chey. l.c. 
3. M. dichotoma, Ule in Notizbl. Kénigl. Bot. Gart. Berlin, v. 
No. 41, 2, and 41a, 16, 19, fig. 1, AB. Tree, 10-40 ft. high, twigs glab- 
Tous ; stems yielding rubber. Leaves long-petioled, firmly chartaceous 
or almost coriaceous, not peltate, cordate at the base, some of the upper- 
most 3-lobed, the others palmately 5-lobed, 6 in. long, 7-8 in. wide: 
lobes united in their lower fourth, acutely acuminate, mucronulate, some- 
times all entire, usually the central and intermediate lyrately lobulate, 
basal lobes entire and much smaller than the central, 24-5 in. long, 
1-1} in, wide, sinuses rounded, broad, glabrous, glaucescent on both 
Sides ; petiole 3-5 in. long, stout, glabrous ; stipules filiform, denticulate, 
in. long. Racemes rather short, 1-1} in. long, from the forks of the 
younger twigs; bracts lanceolate, sharply toothed upwards, } in. long ; 
pedicels 4 in, long or less, the females thickened in fruit; flowers 
ascending, those at the base female, males more numerous and higher up. 
alyx greenish-yellow, 2 in. long or less, glabrous outside, sparingly 
puberulous and densely papillose near the top within, campanulate, 
male 5-partite to about the middle, female 5-sect almost to the base. 
tamens 10; filaments glabrous; anthers glabrous. Ovary glabrous, 
oblong-svoid, 6-winged. Disk glabrous. Capsule oblong, narrowly to 
distinetly 6-winged, 14 in. long, 1 in. wide. Seed ovoid, compressed, 
in. lone, } in. wide.—Kew Bulletin, 1908, 64; Hemsl. in Hook. Ic. 
Pl. tt. 2876, 2877; Pax in Engl. Pflanzenr. Euphorb.-Adrian. 83, 
fig. 11, A-B, fig. 15, F-H. WM. preciosa, Schindl, MSS. ex Agric. Rep. 
