SOUTH WESTERN PARTS OF EUROPE. 57 



Desf. Also most of the Cisti, which cover large 

 tracts of land in the South of Portugal, are met 

 with in the North of Africa. Many others will be 

 shewn hereafter in the Flora Lusitanica.* 



These North African plants are only found in 

 the plains and hotter districts ; the woody moun- 

 tains, on the contrary, yield some vegetable^-*, 

 ductions, which have hitherto been detected only 

 in Madeira, such as Myrica Faya, Pteris arguta, 

 Trichomanes canadensis, and some others. The 

 calcareous mountains, even those of Algurve, have 

 fewer North African plants, but more of those 

 that belong to the other regions of the South of 

 Europe. There are a greater number of plants, 

 peculiar to the South of France, in Algarve than in 

 Alentejo; and it is well known in the country, 

 that the former (with the exception of some spots) 

 is not so hot as the latter. The proximity of the 

 sea, and a chain of mountains which extends 

 almost to the sea, are evidently the causes of this 



* Count Hodman nsecg, who is returned from his botanical 

 travels in Portugal, is now employed upon a Flora Lusitaniea, which it 

 is expected wjll soon appear. T. 



