CAUSES LIMITING PROPAGATION. CHAP. X. 



parallels of latitude as they recede from or approach 

 to the equator; they are consequently the same in 

 all longitudes, and nearly so in corresponding lati- 

 tudes, on either side of the equator. But the 

 warmer climates are more favourable upon the 

 whole to vegetation than the colder, and that nearly 

 in proportion to their distance from the equator. 

 In Spitzbergen botanists have hitherto found only 

 3O indigenous plants, in Lapland 534, in Iceland 

 553, in Sweden 1299, in Brandenburg 2OOO, in 

 Piemont 28,00, in Jamaica, Madagascar, and the 

 coast of Coromandel, from 4OOO to 5000.* The 

 same plants, however, will grow in the same degree 

 of latitude, throughout all degrees of longitude, and 

 also in correspondent latitudes on different sides of 

 the equator ; the same species of plants, as some 

 of the Palms and others, being found in Japan, 

 India, Arabia, the West Indies, and part of South 

 America, which are all in nearly the same latitudes; 

 and the same species being also found in Kams- 

 chatka, Germany, Great Britain, and the coast of 

 Labrador, which are all also in nearly the same la* 

 titudes. 



* Willdenow, p. 374. 



