Cyathogyne. | OXXII. EUPHORBIACEE (HUTCHINSON). 655: 
on the Gaboon River, Mann, 971! near Libreville, Klaine, 1804! 1854! 1868! 
1877 | 2074! 2101! 2159! 2782! Lower Congo: Mayomba, Lecomte, 9 ! 
South Central. Belgian Congo: Eala, Laurent, Pynaert, 655. 
5. ©. Preussii, Pax in Engl. Jahrb. xxiii. 521. Habit of C. 
viridis ; stems puberulous. Leaves obovate-elliptic, shortly acuminate, 
acute or subacute at the base, 23-44 in. long, 1{-2 in. broad, mem- 
branous, margin subentire in the lower third, the other two-thirds 
coarsely repand-dentate, glabrous or nearly glabrous on both surfaces ; 
lateral nerves 5~6 on each side, distinctly looped and reticulate some 
distance from the margin, distinctly impressed above, slightly prominent 
below ; tertiary nerves and veins very indistinct ; petiole 2-4 lin. long, 
tomentellous; stipules subulate, 1-1} lin. long, pubescent. Male 
flowers not known. Female racemes 14 in. long, few-flowered; axis 
puberulous; bracts small, ovate-triangular, acute, puberulous; pedicels 
rather stout, about 1 lin. long. Calyx-lobes broadly ovate, puberulous, 
about Jin. long. Disk annular, sparingly pubescent. Ovary thinly 
pubescent ; styles distinct, thick, shortly bifid, glabrous. Fruits 
unknown. 
Upper Guinea. Cameroons: Victoria, Preuss, 1210; Bipinde, Zenker, 891! 
An imperfect specimen collected by Lecomte (E. 6) at Mayomba in Lower Congo 
probably belongs here. 
24. MARTRETIA, Beille in Bull. Soc. Bot. France, lv. Mém. viii. 64. 
Flowers dicecious. Petals absent. Disk absent from both sexes. 
Male flowers: Sepals 4, slightly imbricate? Stamens 5-7 ; filaments 
shortly connate at the base around a small bifid rudimentary ovary ; 
anthers extrorse; cells parallel, contiguous, dehiscing longitudinally, 
connective produced slightly beyond the apex of the cells. Female 
flowers : Sepals 5-6. Ovary 2-celled, each cel] nearly completely divided 
by a false septum between each pair of ovules, thus resembling a 
4-celled ovary with 1 ovule in each cell; styles 2, connate at the base, 
linear and undivided, slightly twisted, spreading in the same plane as 
the false septa; ovules 2 in each cell. Mature fruits and seeds not 
Seen.—A shrub? Leaves alternate, shortly petiolate, chartaceous, 
entire ; stipules small, deciduous. Flowers in axillary racemes. 
Species 1, endemic. 
Martretia is remarkable among the genera of Phyllanthee in having a two- 
celled ovary, each cell being nearly completely divided by a false septum. 
1. M. quadricornis, Béille in Bull. Soc. Bot. France, lv. Mém, 
vin. 64, Branches clothed with a dull-grey bark ; young branchlets up to 
3in. long, terete, glabrous. Leaves lanceolate, oblong-lanceolate or ovate- 
elliptic, gradually acuminate to an acute or mucronate apex, cuneate at 
the base, 4-9 in. long, 1}-3} in. broad, entire, chartaceous, glabrous 
and somewhat dull on both surfaces ; lateral nerves 10-15 on each side, 
very slender, looped and anastomosing freely well within the margin, 
distinct and slightly prominent on both surfaces; petiole 2-3 lin. long, 
