1816.) - Royal Institute of France. 398. 
it’ had not been made.» It treats of the corollz of this family of _ 
plants. 
In this last memoir the author shows that every corolla of a 
synantherea which is not accompanied by stamina, is monstrous or 
deformed, so as not to afford any character for the definition of the 
family or tribe. It follows from this that the semi-flowerets of the 
semi-flosculous plants, and those of the radiated, have only an 
apparent analogy, which is not capable of undergoing a severe exa- 
mination. . 
He assigns to the corolla of the synantherez three principal cha- 
racters, one of which is very remarkable. It is that each of the 
five petals, of which he supposes the corolla composed, is furnished 
with two very simple nerves, which run along its edge from one end 
to the other on each side, and consequently meet at the bottom 5 
and he attaches to this character so much importance that he pro- 
poses to distinguish»the family by the name of neuramphipetalie. 
Mr. Robert Brown has described this structure in a book published 
at London in 1814. But M. Cassini had pointed it out before him. 
in unequivocal terms in the second of the memoirs to which we. 
have alluded. 
Combining these observations on the corolla with those which he 
had before made on the style and stigma, and on the stamina, the 
author divides the family of the synantherez into 17 natural tribes, 
namely, lactuceee, labiatiflore. (which he admits with hesitation), 
carduacee, xeranthemee, echinopsidee, arctotidie, calendulacea, 
helianthee, ambrosiacece, anthemidece, inulee, asteree, senecionee, 
iussilaginea, eupatorie, vernonia. He disposes these 17 tribes, not 
ina straight line, but in a circular series, which brings the vernonie 
near the lactucez. 
An unexpected and very curious result of this interesting memoir 
is, that by the inspection of a single floweret we can almost always 
determine to what tribe and genus the species which has produced 
it belongs. 
It is to be wished that M. Henri Cassini would speedily publish 
his researches on the ovarium of the synantheree. This will com- 
plete the most profound and original examination to which. this 
family has ever been subjected. 
M. le Baron la Peyrouse, Professor of Botany at Thoulouse, and 
Correspondent of the Institute, has given a memoir on four plants 
of the Pyrenees belonging to the genus orolws, of the family of 
apilionaceous plants. The first of these species had been collected 
y Tournefort, and called by him orolus pyrenaicus latifolius ner- 
vosus. It has not again been found alive, and-is only known by 
Tournefort’s herbarium, and by those of the botanists of his time. 
The second, engraved by Plukenet, under the same name, but ver 
different, has always been confounded with that of Tournefort. It 
is very common in the Pyrenees, After having accurately distin- 
guished these two species by comparative descriptions, M. de la 
Vor. VII. N° V. 2C 
