196 
ON ERYTHROPHLEUM JUDICIALE. 
from Inga, to which genus it and several allied species had been 
referred. Robert Brown, in his botanical appendix to Tuckey's 
narrative of an expedition to Congo, p. 467, states that " the or- 
deal tree noticed in Professor Smith's journal under the name of 
cassa, and in captain Tuckey's narrative, erroneously called a 
species of cassia, if not absolutely the same plant as the red water 
tree of Sierra Leone, and as it is said of the Gold Coast, belongs 
at least to the same genus." Mr. Brown further states, in speak- 
ing of the leguminous plants of the Congo expedition, " Of the 
second order Caesalpineae, the collection contains nineteen species, 
among which are four unpublished genera. One of these is Ery- 
throphleum of Afzelius, the red water tree of Sierra Leone, another 
species of which genus is the ordeal plant or cassa of the natives 
of Congo." 
In subsequently describing the plants collected by Denham and 
Clapperton, (see Brown's appendix to D. and C.'s travels, p. 234,) 
Mr. Brown observes, that several leguminous plants have been dis- 
covered in western Africa with the clubshaped spike, which have 
characters fully sufficient to distinguish them from Inga, to which 
they had hitherto been referred. These plants have been classed toge- 
ther, the type of the tribe being the genus Parkia, one of the most 
striking and beautiful of equinoxtial Africa, so named by Mr. 
Brown, " as a tribute to the memory of the celebrated traveller." 
Mr. Brown further says, " I have formerly endeavored to distinguish 
mimosese from caesalpineae, by the valvular aestivation of its floral 
envelopes, and by the hypogynous insertion of its stamens. In- 
stances of perigynous insertion of stamens have since been noticed 
by MM. Kunth and Auguste St. Hilaire." 
"Erythrophleum, another genus indigenous to equinoctial Africa, 
which I have elsewhere had occasion to notice (vid. ante) and 
there referred to caesalpineae, more properly belongs to mimoseae, 
although its stamens are perigynous. In this genus, both calyx 
and corolla are perfectly regular, and their aestivation if not strict- 
ly valvular, is at least manifestly imbricate, though the flower 
buds are neither acute nor angular. In Erythrophleum and Par- 
kia, therefore, exceptions to all the assumed characters of mimo- 
seae are found, and there is some approach in both genera to caes- 
alpineae." 
A careful study of the specimens from Cape Palmas, in view 
