1915] 



WILLE FLORA OF NORWAY 101 



Judging from the distribution in the present day of a num- 

 ber of plants on the south and west coasts of Norway, it seems 

 natural to assume that they have been brought directly over 

 the sea from the nearest country, Denmark or England. It 

 was thus not necessary for them to move step by step by the 

 long route through Sweden, or even round the Kristiania 

 Fjord, to reach their present habitats. The latter is all the 

 less probable from the fact that certain of them seem to have 

 been imported quite recently, when the climatic conditions 

 cannot have been very different from those which exist at the 

 present time. The following are instances of these : 



Aera setacea grows in Norway from Kristianssand to 

 Stavanger. The species is common in Jutland in Denmark, 

 but in Sweden is found only in the extreme south. 



Airopsis praecox is found from Kragero to Nordmore. It 

 occurs, it is true, in Sweden, from the south up to Vester- 

 gothland and Bohuslan; but from that region to Kragero is 

 considerably farther than from Jutland, where the plant is 

 found in abundance. 



Corydalis claviculata is found from Kristianssand to 

 Haugesund. It grows wild in Denmark and England, but not 

 in Sweden; I assume, therefore, that it immigrated from one 

 of the former countries. 



Galium saxatile is found from Kristianssand to Nordmore. 

 It grows in Sweden from Skaane to Bohuslan, but it is far 

 more probable that it came from Jutland, where it is common. 



Genista tinctoria is found only at Brevik, and must have 

 been recently imported, as there are only a few specimens of 

 it. It is found wild only in southern Sweden, but is common 

 in Jutland. 



Geranium columbinum is found in the district extending 

 from Kragero through the west of Norway to the Trondhjem 

 Fjord. In Sweden it has an eastern distribution from Skaane 

 to Upland. It is common in Denmark. 



Heracleum australe is found from Kragero to Sondfjord. 

 It occurs in Sweden from the south right up to Vermeland, 

 but the distance from this district to Kragero is considerably 

 greater than that from Jutland, where it also occurs. 



