107 
TropicaL Arrica. Upper Guinea: Cameroons; Bipinde, 
Zenker, 1764; 1853; 3790; 4204, 
Lower Guinea : Gaboon ; Libreville, Klaine, 277 ; 1352; 1941; 
2015; 2461; 2474; 2510; 3200. Sibange, Klaine, 2576. 
1330. Hamileoa, Prain [Euphorbiaceae-Crotoneae] ; genus inter 
Gelonieas ob calycem maris imbricatum ponendum sed ob stylos 
indivisos facillime distinguendum. 
Flores dioici, eee roi Calyx globosus ; ; sepala 5, libera, valde 
imbricata. Stam 18, pluriseriata ; antherae  subsessiles, 
pt eter lodellis parallels longitudinaliter dehiscentes. Ovarit 
rudimentum 0. Q Calyx globosus, alte 6-partitus, lobis imbricatis. 
Didet. atti. Ovarium 2-loculare, glabrum ; stylus crassus ; 
stigmata 3, libera, crassa, indivisa. Capsula 3-cocca ; cocci su 
superne et inferne pulvino incrassati. Flores racemosi ; ; racemi 
axillares ; pedicelli utriusque sexus sursum distincte incrassati, fere 
Si. 
H. Zenkeri, Prain ; species unica. 
Frutex scandens, 6-9-metralis. Folia nunc longe petiolata nune 
in eodem ramo fere sessilia, ovato-oblonga, caudato-acuminata, basi 
late cuneata, margine remote serrata, tenue coriacea, 10-25 cm, 
longa, 4-10 cm. “lata, supra saturate viridia subnitida, subtus 
pallidiora, utrinque labra : nervi laterales utrinsecus 8-10 prope 
marginem anastomosantes, ‘subtus distincte elevati; petiolus basi 
minopere, apice distincte pulvinatus ibique geniculatus, nunc 4—5 em. 
longus, nunc ad pulvinum apicalem reductus 2-4 mm, tantum longus ; 
stipulae haud visae. ores in racemos axillares distincte peduncu- 
latos 6—8-floros dispositi ; racemi masculi 2-2°5 cm., feminei 4 cm. 
longi, pedunculis 8 mm. Jon ngis, pedicellis versus apicem distincte 
incraszatis subcarnosis, masculorum 6 mm. femineorum 12 mm 
longis.  Sepala 5, libera, valde imbricata, ‘ovato-oblonga, 4 aa 
Stamina 18, fere seidilin § ; antherae 2-locellatae, longitudinaliter 
dehiscéntes. Ovarii rudimentum 0. Q Calyx 6-partitus, segmentis 
ovatis obtusis imbricatis. Déiseus urceolatus. Ovarium 3-loculare, 
glabrum ; stylus crassus; stigmata 3 libera, crassa. Capsula 
3-cocea, 2 cm. lata; cocci subglobosi, loculicide dehiscentes. 
Semina globosa, 12 mm. lata; testa laevis, maculata, spongiosa ; 
cotyledones latae, planae—Plukenetia Zenkeri, Pax in Engl, Bot. 
_ Tropica Arrica. Upper Guinea: Cameroons; Bipinde, 
Mimfia, Zenker, 2865; 30286; 3646; 4130. 
The imbricate male ‘calyx-segments, the subsessile anthers, and to 
a less extent the leaves, of Hamilcoa — the monotypic West 
African genus Plagiostyles, Pierre. But P. africana (Daphni- 
phyllum africanum, Muell.-Arg. in Flora xlvii. 536 [1864]; 
Plagiostyles Klaineana, Pierre in Bull. Soc. Linn, Par. ii. 1327 
[1897]), the basis of Plagiostyles, differs very greatly in having an 
oblique, 1-seeded, indehiscent fruit with a lateral style. - 
Q 
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