Mr. Bentuam’s Account of two new Genera allied to Olacinee. — 683 
(alum. Yet the imbricate æstivation of the corolla, the stamens often inde- 
finite, the structure of the ovary, &c., will remove them at least as far from 
Olacine as Humiriaceæ. | 
Corneæ, and some other allied albuminous orders, have also some resem- 
blance to Olacineæ ; but the essentially and completely adnate ovarium, the 
epigynous disc, the ovules suspended from the apex of the cells, etc., remove 
them much farther than the two last-mentioned orders. 
In the second tribe of Olacinew, the Opiliew, where the calyx is reduced to 
little more than a dilatation of the torus, we have the nearest approach to the 
Santalacee ; and, if it be admitted that there are true Santalaceous genera 
with a superior ovary, and if I am right in supposing that in the young bud 
of Opilia and Cansjera there is more than one ovule, then these two genera 
become so nearly intermediate between Olacem and Santalacew as to have 
nearly as much claim to be associated with the latter as with the former. In- 
deed it appears to me, from dried specimens, that the structure of the ovule 
in Opilieæ, very different from that of Olaceæ, is very similar to that of The- 
sium. Thus, whilst a considerable gap is observable between Olacinew and 
the nearest allied of the Dichlamydeous orders with which they have been 
compared, the close connexion with Santalacew is completely established 
through the Australian species of Olax and the Opilieæ. 
The third tribe, the Zcacineæ, intimately connected with the two preceding 
ones in most respects, recede from them in some remarkable points, espe- 
cially in the adherence of the placenta to one angle of the ovarium, and the 
seed, which is consequently pendulous, not erect. I should therefore have 
proposed them as a separate order, were it not for the remarkable resem- 
blance to some true Olacineous genera in the arrangement of the floral parts, 
without any distinctive charaeter of importance, other than the one above 
mentioned. 
I now add the detailed characters of the two new genera figured :— 
APoDyTEs, E. Meyer. 
Calyx minimus, 5-dentatus, liber, persistens, fructifer immutatus. Corolla 
hypogyna, petalis 5, oblongo-linearibus, æstivatione valvatis, intus gla- 
bris, basi inter se et cum staminibus coalitis. Stamina 5, petalis alterna, 
VOL. XVIII. 4 
