130 THE JOURNAL OF BOTANY 
Forest, Sussex, and Somerset. This was found by Mr. H. H. 
Knight, of Llandovery, during the Christmas holidays, on trees 
near Harvington, Worcestershire,—J. E. Bagnatu. 
NOTICES OF BOOKS. 
An Account of the British Hieracia. By Rev. W. R. Linton. Pp. 96, 
demy 8vo, wrapper. est, Newman & Co., Hatton Garden, 
H.C. January, 1905. Price 4s. 
Or the making of hawkweeds there is no end. In the eighth 
edition of the London Catalogue there were 40 species and 18 
varieties. In the ninth edition (1895) the list extended to 104 
species, 114 varieties, 2 hybrids, and 1 form. In Mr. W. R. 
Linton’s Account there are 124 species, 130 varieties, 5 forms, and 
1 subspecies—making a grand total of 260 names. In the index 
is implied also in the author's Introduction, where, in speaking of 
climatic conditions, he says :—‘ Hieracia are found mostly on hills, 
5 y on mountains, only very few forms ng on 
the p - The inference is that it is the climatic conditions 
of these regions (montane and alpine) which are especially favour- 
able to the genesis of new forms. The nature of the high alpine 
forms (short stature, large, single, or few heads), the nature also of 
the montane forms, and the habit tall and leafy of those which 
grow by stream-sides,—all favour the same idea that the different 
species are due to varying climatic conditions.” This brings one 
to the gist of the argument as to what really constitutes the basis 
of the essential characters which are alleged themselves to con- 
stitute ific di ces, and in a subsidiary degree varietal 
differences, in a protean type like Hieracium. Nigeli long ago 
