FLORA OF SOUTH AMERICA. 623 
are to be met with in fruit, and it is that organ which 
appears to present the most remarkable variations. In some 
species, the achænium is entirely included in the enlarged 
fleshy tube of the perigon, whilst the lobes are scarcely 
altered, and persist in the form of a crown at the summit of 
the fruit, like the calyx of Rubiacee and other orders 
with adherent calyxes or so-called inferior fruits. In other 
species the whole perigon becomes fleshy and scarcely covers 
the achænium, the upper part of which is more or less free; 
and in some cases the ovary and fruit, instead of being 
sessile at the base of the perigon, are born upon a more 
or less evident fleshy support. I have not seen the fruit of 
a sufficient number of species to ascertain whether these 
differences correspond with the variations observable in the 
venation of the leaves, the inflorescence or flowers, and what 
importance may therefore be attributable to them; but I 
have ventured, in the Botany of the Voyage of the Sulphur, 
to propose under the name of Campderia, a new genus for 
a plant, in which the perigon does not appear to become 
fleshy at all, but encloses an almost dry achænium supported 
on a thick fleshy stalk, although the general habit of the 
plant be that of several Coccolobe. In many species of 
Coccoloba the ovary is abortive in several flowers, but I 
. have never observed any deficiency in the stamens, and this 
partial polygamous disposition appears to be of very little 
importance. 
Among the Triplaridee, the two genera Triplaris and Ru- 
| : . prechtia are very appropriately distinguished by Dr. Meyer. 
.. In both of them the arrangement of the stamens in the male 
flowers is the same as in other regular hexamerous en- 
neandrous Polygonee, and does not appear to me to have 
been quite correctly described in Endlicher's Genera. I 
». always find one stamen opposite to each inner segment, and — 
a ; one close on each side of i it; so that when the flower is fully 
expanded, there is a ho interval opposite to each. outer 
. Segment of the perigon, as represented in Eriogonum. 
. positum, Linn. Trans. v. 17, pl. 17, fig. 10, €. e AN cise 
