Control by Extremes 



161 



Dahl, 1951 



Fig. 5.12. Locations of the most southern and eastern records in Scandinavia 

 of three flowering alpine perennials and the maximum summer temperatures. 



X Lactura alpinu, correlated with 29° C isotherm. 



o Ranunculus platanifolias, correlated with 2T'C isotherm. 



• Saxifraga foUolosa, correlated with 23° C isotherm. 



