274 RI K A RD STERNER 



How are the South Swedish continental species divided between the established 

 general distribution types (p. 238)? In many cases the classing of a species with 

 a certain distribution type is rather difticult, because the distribution of species 

 often forms a transition between two types. Calculation has given the following 

 results (the figures within brackets give the maximum number of species): 



Meridional: 



Pontic: 7 (g). — Out of these there are to refer to the 



Danubian variant: i (2), Lactuca quercina and (Inula ensifolia) — to the 



Variants of transition-types: 4 (b). 



Pontic — (South and) Central European: 8 (10). 



Pontic — Subatlantic: 2. 

 Meridio-Boreal: 



Pontic — Sarmatian: 4 (6). 



Ponticosarmatian — Central European: 26 (38). 



Pontic— Baltic: 3 (4). 



Ponticobaltic — Central European: 2 (4). 

 Boreal: 



Sarmatian: 12 (14). (The Cassubian are included.) 

 [Cassubian: 5 (6).] 



Sarmatian — Central European: 16 (26). 



Baltic — Central European: 4 (10). 

 Siberian: 4 (5). 



Concerning the distribution of the continental species in South Sweden we may 

 here, without entering into a close examination, state that it varies largely. 

 A considerable number of species, 18, are spread over practically the whole 

 district and do not reach their limits until further west, while on the other hand a 

 great number of other species are limited to Oland and Gotland (18) or Skane (4). 

 If we look at the extension of the distribution area towards the north in Sweden, 

 we shall find a somewhat greater coincidence, in so far as only a couple of species 

 reach far enough north of the Central Swedish plain. 



Without the aid of a close examination a connection between the distribution 

 and mode of occurrence in South Sweden may also be stated. Species belonging 

 to steppe-like vegetation (xerophilous herb and grass communities) have generally 

 a less comprehensive and easterly or south-easterly distribution, whereas the species 

 of the coniferous and broad-leaved forests are more evenly distributed. 



A list is given in Appendix I of continental species in the South Swedish flora 

 besides information about the chief features of the general distribution of species 

 in Europe: the boundaries of the species in Russia and Central, Western, or North- 

 western Europe. The species are here arranged in groups according to their 



