COLLECTION AND IDENTIFICATION OF ROSES 951 
and long, or may form a dense pubescence, which may hide the 
glands, or may be very short and close. These differences may 
give auxiliary characters for the determination of species. 
tipr s been made of the shape and clothing of 
these organs and their auricles by Continental authors. We have 
found them more reliable as group than as specific characters. 
Thus, in the Rf. glauca group, a prominent feature is the broad- 
ness of the stipules and auricles. In the R. pomifera group they 
as , 
are falcately incurved, instead of being porrect or diverging. 
Inflorescence.—Excepting that in some species solitary flowers 
prevail, while in others they are more often in a cluster, the in- 
space is given to describing the shape and size cts rela- 
tive to their importance 81 r opinion usually ver 
a o some extent the development of the bracts 1s in Inverse 
sm 
ratio to that of the peduncles, species with short peduncles usually 
having large and broad bracts, and vice versd, and though this 
negligible; most of the members e R. coriifolia group, for 
example, may be known by their large broad bracts, while thos 
of the R. stylosa group have them narr othing of the 
les—The peduncles give important features by their 
re) 
on the peduncles is the sole feature by which the Hispide or 
. andegavensis subgroup are separated from the Lutetiane and 
Dumales, and they are almost universally present in the subsection 
Villose and the R. Eglanteria groups. The two latter contain 
he FE 
to re than a very occasional adventitious gland on 
those of the Lutetiane or other smooth-peduncled subgroups or 
glandular peduncles into the same spe hus rendering their 
identification by technical characters difficult, though perhaps 
r a more rational treatment. In a few species hairy peduncles 
portance. 
The length of the peduncles varies considerably, not only 
