16 SOILS AND SPECIES. 
flora, though there are several species which are noticeable for 
their prevalence on them. A few plants have been found only 
in this division, viz., Rubus pallidus Weihe, Rk. Marshalli Rogers, 
Senecio viscosus L., Alopecurus fulvus Sm. Plants markedly 
abundant on this formation are Z’'anacetum, Tussilago, Hieracium 
boreale, and owing apparently to the cold soil there are fewer 
species to be found in this division than in others, but many 
individual plants. 
P.—PERMIAN.—Beyond the northern part of the coal- 
measures eastward rises the Permian formation (Red Sandstone 
and Magnesian Limestone), which occupies a more or less oblong 
tract of the County from Ault Hucknall and Pleasley on the 
south by Bolsover and Barlborough northward, being a westward 
extension of the Permian system of Yorkshire and Nottingham- 
shire. The red sandstone occupies a very narrow strip between 
the coal measures and the magnesian limestone from Barlborough 
by the west of Bolsover to the ‘south border. The magnesian 
limestone lies at a lower elevation than the cognate mountain 
limestone, and like that formation has dales on its borders, viz., 
three—Markland Grips, Cresswell Crags, and Pleasley Park, 
where we have the wall-like lines of rock with characteristic 
flora. But there are sufficient differences in the species it 
supports to give its flora a distinctive character, as will be seen 
from the accompanying list :— 
Helleborus viridis L. 
Arabis hirsuta R. Br. 
Helianthemum Chamecistus J/7//. 
Viola hirta ZL. 
Galium Mollugo Z. (Abundant here, rare everywhere else.) 
Erigeron acre L. 
Inula conyza DU. 
Cnicus acaulis Hoffm. 
Campanula Trachelium ZL. 
*Galeopsis Ladanum J. 
Taxus baccata L. 
