Praeger — Oil Typea of Distribution in the Iriah Flora. 39 



descend to near sea-level). Thirteen more favour light or sandy 

 soils. Mne are water plants, but marsh and bog plants are few. 

 Seven are typical calcifuge species, one only {Cerastium arvense) is 

 slightly calcicole. Comparing their distribution in Great Britain, a 

 corresponding diversity is apparent. Eight are of pure Highland type, 

 one of Scottish, seven more have Highland or Scottish tendencies. 

 Six are of English type, two of Atlantic ; the remainder are British 

 or composite. 



For our map we have a maximum of 39 species (or 88 per cent, of 

 the group) in Antrim, a minimum of in Longford. |!- The avoidance 

 by the group of the low-lying Central Plain and limestone areas 

 comes out clearly. 



Fig. 31. — Distribution of " Marginal " plants. 



Maritime plants of general distribution round the coast are not 

 classed as of Marginal type, as their proper place seems to be rather 

 in the General type. In cases of restricted range, they are placed 

 under the type to which are referred other species of similar distri- 

 bution. 



4. ULTOiiriAN Type. — Into this group comes much of the northern 

 element of the Irish flora. The list given below numbers forty-five 

 species, which might be swelled by the addition of numerous Hawk- 



