492 Scientific Intelligence. 
races, or distinct but closely related types, in very early times, 
and those under cultivation have themselves varied and subdivided 
more anid more. Finally, M. — maintains, seemingly with 
good reason, tint + to combine into one genus the Apple, Pear, 
Quince, Sorb and Mountain Ash, as ces by Linnzeus and followed 
by the latest authorities, is to misconceive the laws of the viateieal 
h u 
system ; tha nite generically these plants, which differ in 
the sod a of their wood, the vernation of their leaves, their 
inflor e, the xstivation of the corolla, and the structure of 
thei r fruit, : Hogicaly leads to the combination of all Pomacee into 
one ordingly restricts the genus Pyrus, or (restor- 
ing the classical Sabagraphy) Pirus, as did Pournefott and Jus- 
sien, to the er. To the organography of this restricted 
observed is ugh He notes that the vernation of the 
leaves is involute in Py t Cydonia, Mespilus and 
a; t the cottony-leaved varieties, no less than the smooth 
ones, are glabrous in the seedling stage; that all varieties of the 
the mean temperature reaches about 10° Centigrade, without per- 
ceptible difference between the a and the latest-ripening 
varieties; that the exstivation of the corolla is convolute in 
ydonia, bu 
cial i in other Pomacewe (but in the two ee of nies owers on 
and the convolute modes which often occurs, but which ae 
be Aa as the type of certorexotaeeat that tere are two types o: 
to size of the corolla in the common Pear, the smaller flowered 
type comprehending most of tha culsivared varieties ; that the 
r of Pear-blossoms is rather disagreeable than otherwise in 
contrast with those of Malus, which are sweet-scented. Moreover, 
the anthers in the Pear genus are tinged with violet; those of the 
— genus are yellow 
s to the morphology and development of the gynw¢ 
Decaisne reproduces in full the note which he published in ae 
Bulletin of the Botanical Society of France in 1857. From his 
ponent iy it pete that the five carpels in their early devel- 
re free and distinct in the concave center of the seen) 
may it “ later sihee: when the concave om as has beco 
up a 
which 
‘he flesh 
