lee. 
313 
SALIENT CHARACTERS IN HAIERACIUM. 
By Freperic N. Wiiu1ass, F.L.S. 
produced, throw much light on the value of group-characters and 
Pp 
their constancy in allied forms. Whatever forms are selected for 
certain others appear recessive and tend to disappear 
i ion of the 
Dahlstedt, and the earlier ones of Fries. These remarks are 
intended to convey that when a doubtful hawkweed, whether from 
letch or from corrie, is sent to a Scandinavian hieraciologist for 
examination, and is returned marked ‘not known in Scandinavia,” 
or ‘‘a nostris diversum,” it is not then and there to be dubbed 
nothing could make it so. As rightly defined by Bischoff, Asa 
m 
also characteristic of the group of Oreadea, and altogether absent 
from the leaves of Vulgata, forming an essential point of difference 
: airs may be simple or compound. Ordinary 
hairs have a separate and distinct attachment to the surface, and 
