CONTRIBUTIONS TO BOTANY. 
177 
borne out by the facts as they appear to me. He says also, re- 
garding the ovules, “ raphe et in adscendente et in pendula ex- 
trorsa to me, on the contrary, this seemed in both instances 
directed towards the axis of the ovary, or, perhaps, somewhat 
lateral to it, and in either case therefore introrse : in this respect 
they appear to differ from those of the Styi-acinece, being thus 
heterotropous, while in the latter tribe, if we regard the fact of 
their resupination, they are all isotropous. The position I have 
assigned to the raphe in Halesia is moreover proved by its 
direction in the ripe seed, where it is always turned away from 
the wall of the nut, and facing the centre of its open space ; and 
this is constantly the same, whether the chalaza be superior or 
infei’ior in regard to the apex of the fi’uit. 
I have adopted the opinion of Cavanilles in considering Stri- 2 . 
gilia distinct from Styrax, with which it has been associated by 
later botanists ; the reasons for this conclusion will be presently 
stated. The former genus will comprise all the South American 
species of Styrax enumerated byDeCandolle. The Mexican species 
of the genus, from the imbricate aestivation of their corolla, appear 
to be congeneric w'ith the North American and European forms. 
In looking over the Hookerian herbarium, I noticed two or 
three species which I had no hesitation in referring to the Cxjrta 
of Loureiro, — a genus placed by Endlicher as an aberrant form 
of the Order, and by DeCandolle excluded from the family solely 
on account of its superior ovary (Prodr. viii. 245) : this reason 2 
is untenable, because in the structure of its ovary it offers no 
difference whatever from Styrax and Strigilia. I have examined 
Cyrta carefully, and find that it agrees with Strigilia in the 
almost coriaceous texture of its petals and in their valvate aesti- 
vation, in which respects both notably differ from Styrax. 
Owing to the singularly different structure of the fruit and 
seed in Halesia and Pterostyrax, it appears desirable to restore 
the tribe Halesiece. I do not see the propriety of retaining 
the tribe Pamphiliece, which differs in no respect from the Sty- 
racineee, except in having only one or two erect ovules in each 
placental division : we find in Styrax Japonica also two erect 
ovules in each cellule ; so that there is no real character to justify 
the separation of Pamphilia and Foveolaria to form a distinct 
tribe. It is true that the former has only five stamens ; but the 
latter, on the other hand, has the same number as Strigilia. 
Hence I propose to divide the Styracem into two tribes, the 
limits of which may be thus defined : — 
Tribus 1. Styracine^. Ovarium superum, 1-loculare, imo 
breviter 3-septatum; ovula plurima, erecta aut horizontalia. 
Fructus drupaceus, omnino superus, 1-locularis, pericarpio 
VOL. I. 2 a 
