78 THE JOURNAL OF BOTANY 
' Our aggregate ‘‘R. pumztorum Whe.” igs Split up into two main 
species, viz. R. diversifolius Lindley (= myriacanthus Focke), with 
fi. ferus Focke (1902) = R. ferox Whe (1824) = R. dumetorum 3 ferox 
( 
= Rf. dumetorum Whe. pro parte; each haying several subspecies and 
‘races included under it. 
In conclusion, I must apologize for the incompleteness of the 
above extracts; had full descriptions of the many important forms 
in question been quoted, this sketch would have run to an inordinate 
‘length. Unfortunately, none of our more accomplished bramble- 
students appear ow German ; this must serve as my excuse for 
attempting a task for which m comparatively slight and 
scrappy acquaintance with the British Rudi is decidedly inadequate. 
.S.—The following extracts from a recent letter of Dr. Focke 
may be of interest :—“ Some months ago I resigned my post, so 
that Iam again able to occupy myself with botany more than of 
late. . . . When treating Rubus in large botanical works, one is 
ASTER SEDIFOLIUS L. AND ITS VARIETIES. 
By Frepertc N. Wriuiams, F.L.S. 
the species, and for sifting, co-ordinating, and codifying the differ- 
ential characters adduced for their discrimination, both from one 
another and from allied species. 
