CONTRIBUTIONS TO BOTANY. 
95 
and have a less prominent internal keel, the summit of which, 
together with the upper margins of the filaments, are fringed 
with very long clavate hairs; the anthers are 2-lobed and sagittate 
from near the almost apical point of their attachment ; the lobes 
are membranaceous, each longitudinally split open and quite 
void of pollen or other matter, so that it is not apparent whether 
they have been fertile or sterile. The ovarium is the length of 
the stamens, is cylindrical, a little curved, and rather thicker 
towards the apex ; in diameter it is scarcely broader than the fila- 
ments, quite smooth, and surmounted by a short, compressed, 
umbilicated, and somewhat 5-lobed disciform process, which 
partly overhangs the summit ; the body of the ovarium exhibits 
only a single large cell, of nearly its whole length, from one side 
of which, near the summit, two ovules, that almost fill the cavity 
of the cell,are suspended, each from a short cupshaped strophiole*. 
Platea. 
In commenting upon the genera of the Icacinacece, I have fre- 
quently spoken of Phlebocahjmna, a manuscript name proposed 
by Mr. Griffiths for a plant collected by him in the jMalacca 
Peninsula, but as I am unable to discover that any of its cha- 
racters are appreciably distinct from the Platea of Blume, the 
former must necessarily merge into the latter genus, which was 
first established by that distinguished botanist in his ‘ Bijdra- 
gen,’ and more lately recorded in his ‘Mus. Bot. Lugd.,’ 
where he enumerates another new species. In describing the 
characters of Stemonurus, I have stated {ante, p. 82), that the 
chief or perhaps only feature that can distinguish Platea, is the 
absence of the glandular hairs, that form a beautifully fringed 
crest over the anthers in the former genus, and as this was 
believed only to be a sexual difference, I had considered Platea 
as identical with Stemonurus. In the former, as also occurs in 
many species of the latter genus, the filaments are said by Blume 
to be short and broad (whence probably the generic name from 
TfKarela, ampins), while in Phlebocalymna, although when in bud 
they are short and broad at base, they become afterwards long and 
linear: the differences in regard to their relative length and breadth 
are probably only specific, as we find them to occur in Stemonurus. 
After desiccation, the flowers oi Phlebocalymna appear of an orange 
colour, which is probably retained from the living state ; they 
are somewhat more transparent and agglutinated at their edges 
than in Stemonurus, the cal 3 rx is more distinctly 5-lobed, and the 
segments are imbricated in aestivation, a feature also recorded by 
* This species, and the details of its floral structure, will he exhibited in 
plate 15. 
