A TRIBE OF RHIZOPHOBACE X. . 69 
PELLACALYX. 
Of the single species known of this genus, P. axillaris, Korth., 
I have seen specimens from Penang, from Phillips's Collection, 
formerly in the Horticultural Society's herbarium, and among 
Griffith’s Malacca plants. To Korthals’s detailed and accurate 
description I have only to add that the seed, as in Gynotroches, is 
small, ovoid, with a crustaceous testa, and a straight cylindrical 
embryo in the centre of the albumen. The genus is quite distinct 
both from Carallia and Haplopetalum in the form of the calyx and 
the clustered ovules, as well as in habit and other characters. 
HAPLOPETALUM. 
I have seen no specimens of this plant; but A. Gray's elaborate 
description and beautiful .plate in the * Botany of the American 
Exploring Expedition' are sufficient to characterize it in every 
respect, excepting the fruit, which is unknown. The habit, inflo- 
rescence and flowers are those of Gynotroches, except that the 
Petals are sessile and entire, the ovary inferior with a central 
axis, but not divided into cells, probably from the disappearance 
of the dissepiments after а very early stage, and that there are but 
two collateral ovules to each cell. 
GYNOTROCHES. | 
This genus was originally established by Blume in his ‘Bijdragen,’ 
but having been referred to Guttifere, it was very naturally over- 
looked by Arnott, when describing his Dryptopetalun... Blume has 
subsequently, in his ‘ Museum Botanicum,’ established the generic 
identity of these two plants, which indeed are probably but one 
Species, not uncommon in the Indian Archipelago. The length of 
the pedicels and number of parts of the ovary and stigmata vary 
equally in the Javanese, the Penang, and the Malacca specimens. 
Blume's third species, however, with minute, almost sessile flowers, 
from Borneo and Sumatra, is probably distinct. Asa genus they 
differ from Cassipourea (of which they have the inflorescence and 
Most of the characters) by the small deeply-cleft calyx, the 
ovules 4, not 2 only, to each cell of the capsule, and by the terete 
embryo. As in Blepharistemma, the flowers of the common species 
are to a certain degree dicecious; in some specimens the ovary is 
slender and empty, whilst the petals and stamens are very fully 
developed; in others the ovaries are complete and the petals and 
stamens more or less reduced. This gives to diferent ete 
à very different and explain the differences w 
uie E CUR MET 
