506 CONTRIBUTIONS TO 
by a hollow cup. The following is the outline of its generic 
character. 
ALIBREXIA (gen. nov.)—Calyz persistens, utrinque dense 
tomentosus, 5-partitus, lobis linearibus vel 3-angularibus 
obtusiusculis erectis. Corolla hypogyna, inferne tubulosa, 
superne tubuloso-campanulata, limbo ad basin 5-partito, 
laciniis parvis rotundatis reflexis. Stamina 5, ineequalia, 
inclusa ; filamenta imo tubi orta, basi villosa, hinc subulata 
graciles, inæquales, tubo corolle breviores: anthere basi- 
fixæ, oblongæ, 4 sulcatæ, 2-loculares, longitudinaliter de- 
hiscentes. Discus hypogynus breviter stipitatus, patellifor- 
mis, margine crasso, 5-lobo, 10-crenato, gynobasin centralem 
cingens. Ovaria 10, distincta, circa gynobasin conicam 
biserialiter aggregata, et angulo interno affixa, 1-ovulata. 
Stylus centralis, 5-striatus, longitudine staminum. Stigma 
clavatum, 5-lobum. Drupe (alteris abortivis vel coalitis) 
5-8, distincte, carnosule, demum siccæ; nua ovoideo- 
rotundata, subossea, 1-4 locularis, loculis 1-spermis, basi 
imminuto 1-4-foveolato, fovea operculo semi-clausa. Semen 
solitarium, reniforme, compressum, testa tenui operculo 
persistente affixa. Embryo filiformis, intra albumen carno- 
sum cyclicus, cofyledonibus semiteretibus, radicula ad hilum 
spectante. 
Plante suffruticulose Chilenses, prostrate, succose, in savis 
mare adspersis incole; caulibus ramosis; basi subligneis, 
ramulis succosis; foliis alternis, sub-confertis, lineari-spathu- 
latis, carnosis, velutino-tomentosis, pilis ramoso-articulatis, 
vel stellatis ; floribus parvis, axillaribus, pedunculatis. . 
l. ALIBRExIA rupicola :—prostrata; folis lineari-spathu- 
latis, confertis, tomentosis: floribus solitariis, axillaribus, 
pedunculo calyceque utrinque tomentoso, calycis laciniis 
linearibus, corolla parce pubescenti, violascenti-albida.— 
Chile, ad Concon. 
_ The plant spreads itself in a dense mass upon the surface — — 
of the rock to which it is attached, is frequently washed by. 
the surf, and constantly exposed to the spray of the sea. 
The leaves are small, linear, spathulate, with a rounded apex, 
