200 THE JOURNAL OF BOTANY 
In our list new county records are marked with a +, while records 
new for the geological ee under consideration are starred. 
A step greatly in advance of the majority of ‘County Floras”’ 
was taken b r. Linton in recording the distribution of the 
plants separately under ome geological formation. This brings 
out clearly the striking effect of the subsoil on the flora. Much 
may be, and indeed has reat! said in favour of the primary 
division of a district according to river-valley-systems, and to a 
certain extent it may be desirable in some instances to adopt this 
especially in rabereeyey flat districts with but little 
diversity of geological substr In Derbyshire, however 
where the geological peiaton is pacoee diversified, that mode 
of division as a primary one would be eminently i, 
even as a secondary mode of division. In the following list Mr. 
Linton’s divisions are followed in the aes ied for reasons to be 
stated wee are re departed from in two part 
i 
eect notes are given 
hens Measures comprise the greater part of the north- 
eastern abd eastern parts of the county, and also occur in the 
west as an undo n of the Lancashire and Cheshire Coal Field. 
the whole the flora is more closely related to that of the upper 
and middle Coal Manus, and is more naturally treated under 
this head than the 
G. e exte ueaive * Mitlsto one Grit formation in Derbyshire 
everywhere lies between the Coal Measures above and the Yoredale 
s 
gh; in this paper 
this arbitrary division is ignored, and the Grit is alittle as a single 
formation, as ndood it is geologicall y: 
