178 
CONTRIBUTIONS TO BOTANY. 
indehiscente aut 3-valvari. Semen unicum (rarissime 2), 
testa ossea, raphide infinitissime diviso in telam cottoneam e 
vasis numerosissimis spiralibus undique sparsis, et hinc cum 
endodermide solubili. — Genera Styrax, Cyrta, Strigilia, 
Foveolaria, Pamphilia. 
Tribus 2. Halesie^. Ovarium semisuperum, 1-loculare, imo 
breviter 4-5-septatum. Fructus inferus, alatus, pericarpio 
nuciformi indehiscente, centre omnino vacuo, locellis 1-2-3 
parvis parietalibus osseis 1-spermis. Semen parvum, testa 
membranacea, raphide simplici ventrali. — Genera Halesia, 
Pterostyrax. 
Many other genera have been placed in this family by dif- 
ferent authors, all of which (if we except Cyrta) have been very 
properly excluded by Prof. A. DeCandolle in his ‘ Prodromus ’ 
(viii. 245). Among these is Diclidanthera, a genus which has 
lately been amply elucidated by Prof, von Martins in his ‘ Flora 
Brasiliensis’ (fasc. xvii. p. 11. tab. 4), who, while placing it there 
among the Ebenacece, endeavours to show its nearer affinity to- 
wards Polygalaceee. It appears to me to hold a different rela- 
tionship, as I shall shortly demonstrate in a separate paper on 
this subject. 
I will now proceed to offer the characters of each genus of 
this family in the succession above indicated, mostly derived 
from my own observations, prefacing each of them by a few 
remarks. 
1. Styrax. 
This genus is distinguished principally by the decided imbri- 
cation of its petals in aestivation, in which feature it differs from 
Cyrta, Strigilia, Pamphilia, and Foveolaria ; its petals are thin- 
ner, larger, and more membranaceous in texture than in those 
genera, and in this respect, and in their aestivation, resemble 
those of Halesia and Pterostyrax. In the typical species, S. of- 
ficinalis, the petals often exceed their normal number, five, being 
sometimes as many as six, seven, or eight. The filaments are 
longer in proportion to the anthers than in Strigilia and Cyrta ; 
and in some species the stamens also differ from their normal 
number, ten, being sometimes as few as six or seven. The endo- 
carp of the fruit is much thicker than in Strigilia. 
Styrax, Tournef. Benzoin, Hayn. Lithocarpus, Bl . — Calyx 
campanulatus, margine fere integro, vix 5-denticulato, per- 
sistens. Petala 5-6-7-8, oblonga, ohtusa, extus tomenteUa, 
imo adhsesione filamentorum in tubum brevem conniventia, 
aestivatione plus minus ve imbricata. Stamina 10, interdum 
