APPENDIX TO THE ‘SPICILEGIA GORGONEA.' 311 
stigmata, belonging to the same phyllidium, are confluent, either in 
part, as in many Resedacea, or entirely so, as in Caylusia. 
The above is the primary and usual conformation of the Order. 
Caylusia presents merely a modification of this structure. The phyl- 
lidia in this genus are six in number, and free to very near their base, 
the six short double placentz, the result of their union, coalesce, and, 
masked by the thickened bases of the leaves, seem to form what has 
been called a central placenta, but which in fact is a mere union of 
the approximated portions of the twelve margins of the six ovarian 
leaves. There are necessarily thus six very short parietal placente. 
That this is the case is demonstrable not only from analogy, but from 
the position of the ovula, which are not scattered over the surface of 
a truly central placenta, as in Myrsineacee, but are twelve in number, 
forming at the base of the apparently central placenta a marginal 
row, and on closer inspection it is easy to perceive that each of them 
is placed at the base of the placentiferous margin of an ovarian leaf. 
They are in fact the lower rank of ovules, such as they present them- 
selves in all Resedacee, and they are thus reduced in number, owing 
to the extreme shortness of the united placentze, whence there is room 
upon each ovuliferous nerve for only one ovule. 
The apparently anomalous structure of the ovarium in Astrocarpus 
may be traced to similar causes. 
CAPPARIDEEF. 
13 a. Crateeva Adansonii, DC.  Crateva læta ejusd. This fine 
species, a native likewise of Senegal, has been added by M. Bocandé 
to the Flora of the Cape de Verds. It is one of those plants which 
so commonly occur, both on the western and the eastern sides of the 
African *ontinent between the 10th and the 20th degrees of northern 
latitude. It was found by Kotschy in Nubia, and by Dr. Oudney 
in Bornou, and was the only African species of this splendid genus 
when Mr. Brown published, in 1826, his remarkable observations on 
the plants collected by Dr. Oudney and his companions. A second 
has been since added, the C. Guineensis, Schum. Mr. Brown observes 
that the specimens from Bornou, and one from Senegal, are herma- 
phrodite, but that in a specimen marked as C. læta, from Senegal, the 
flowers were all male, with an imperfect pistillum. In our specimens, 
as in that of Kotschy, the flowers form almost a perfect corymb, the 
