THE FLORA OF SOUTH AMERICA. 505 
linear acute segments, is scarcely more than a line in length. 
The tube of the corolla, which is slender below, swells con- 
siderably above. 
ÂLIBREXIA. 
Under this name I propose a new genus for a prostrate 
plant that I found growing upon the rocks in the Caleta of 
Concon in Chile, in the year 1823, where it was constantly 
exposed to the spray of the sea, whence its name, from 
alBpeëë, mare madefacio. It differs from Nolana and Sorema 
by having 10 carpels supported upon a distinctly stipitate 
disc quite free from the calyx, by a more tubular corolla 
with a border cleft to the base into 5 very small rounded 
reflexed lobes as in Dolia, and by its drupes with rounded 
oval nuts umbilicate at base, the perforation not being wholly 
filled up by a woody operculum or strophiole-like process, 
and by the constant adhesion of this process to the testa. 
It differs from Nolana and Alona, in having a somewhat 
. fleshy corolla, with a small 5-lobed border, not one that. is 
broad, deep and campanular. From Dolia it is distinguished 
by its herbaceous, fleshy and prostrate habit, not being suf- 
fruticose with a decidedly woody erect stem: by its stamens 
arising from the base of the corolla, not simply fixed in the 
middle of the tube: by its calyx being cleft nearly to the 
base, by the greater number of its ovaries, by its nuts being 
quite rounded, and narrowed at base to a slight ring around 
the areolar cicatrice. It differs from Aplocarya (a genus 
hardly distinct from Dolia) in the want of the very con- 
spicuous, large, cicatrized base of its drupes, to which a 
portion of the withered receptacle and disc often remains 
attached, in having 10 distinct ovaria, and a more infundi- 
buliform and less hypocrateriform corolla, and by its stamens 
not being exserted. It differs from all others by its ramified 
and stellate, not simply articulate pubescence. As in Doğa 
. and Aplocarya, the tube of the corolla is quite free, both ‘Tom 
the fleshy dise and the calyx, but in Alibrezia it falls off by 
a horizontal line parallel with the Eo leaving i it surrounded = 
VOL. IV. co F + a 
