CH. V] 



ASSOCIATIONS OF ROCKS AND SCREES 



135 



occurring on the limestone cliffs of Derbyshire, the species 

 which do not occur on the sandstones or shales are preceded 

 by the letter " L." The list is by no means an exhaustive one, 

 as a fall list would contain many of the plants of the ash 

 woods, related scrub, and calcareous pasture. However, certain 

 species are more partial to the cliffs than to any other kind of 

 habitat. The following are species of this character : — 



