APPENDIX. No. Y. 427 
In Hippocratices, the insertion of the ovula is either towards the base, or is 
central; the direction of the radicle is always inferior. In these points of 
structure, which are left undetermined by M. de Jussieu, they differ from 
Malpighiaceee, but agree with Celastrine, to which, notwithstanding the dif- 
ference in insertion and number of stamina, and in the want of albumen, they 
appear to me to have a considerable degree of affinity ; especially to Elseoden- 
drum, where the albumen is hardly visible, and to Ptelidium, as suggested by 
M. du Petit 'Thouars,* in which it is reduced to a thin membrane. 
SAPINDACEA. Only four plants of this natural family, which is 
almost entirely equinoctial, occur in the herbarium. Two of these are new 
species of Sapindus. The third is probably not specifically different from Car- 
diospermum grandiflorum of the West India Islands. And the fourth is 
so nearly related to Paullinia pinnata, of the opposite coast of America, 
as to be with difficulty distinguished from it. M. de Jussieu, who probably 
intends the same plant, when he states P. pinnata to be a native of equinoctial 
Africa, has also described a second species from Senegal.| No other species 
of this genus has hitherto been found, except in equinoctial America; for 
Paullinia japonica of Thunberg, probably belongs even to a different natural 
order. The species from Congo, however, seems to be a very general plant 
on this line of coast ; having been found by Brass near Cape Coast, and by 
Park on the banks of the Gambia. 
In Sapmdaceze there is not the same constancy in the insertion of the 
ovulum and consequent direction of embryo, as in the two preceding orders. 
For although, in the far greater part of this family, the ovulum is erect and 
the radicle of the embryo inferior, yet it includes more than one genus in which 
both the seeds and the embryo are inverted. With this fact it would seem 
M. de Jussieu is unacquainted; § and he is surely not aware that in his late 
Memoir on AZelicocca* he has referred plants to that genus differing from each 
other in this important point of structure. 
TILIACES. It is remarkable that of only nine species belonging to this 
* Hist. des Véget. des Isles de V Afrique, p. 34. 
+ In Annal. du Mus. d’ Hist Nat. 4, p. 347. £ loc. cit. p. 348. 
§ Annal. du Mus, d’ Hist. Nat. 18, p. 416. || Mém. du Mus. d’ Hist. Nat. 3, p.179. 
