The numbers, taken by centuries, are, iii the 16th century, 89 ; 

 in the 17th, 131; in the 18lh, 445; and, in the first 'three de- 

 cades of the 19th, 699! The total number of foreign trees 

 and shrubs introduced up to the year 1830, appears to be about 

 1300; or, probably, up to the present moment, including all 

 those species which have not yet flowered, and, consecjuentiy, 

 have not yet been recorded in books, about 1400. 



The countries from which these 1 300 species have been intro- 

 duced appear, from the Hortiis Britaiviiciis, to be as under: — 



Europe; Greece, Turkey in Europe, and the Levant, 36; 

 Italy, 35 ; Sicily and other Mediterranean islands, 19; Spain, 

 69; Portugal, 12; Switzerland, 49 ; France, 34; Germany, 52; 

 Hungary, 46; Russia, 41 ; Sweden, 4 ; Lapland, 4 ; Spitzber- 

 gen, 1; North of Europe, 2; Central Europe, 18; South of 

 Europe, 111: in all, 543. Asia; Siberia, 69; Asia Minor, 3; 

 East Indies, 4 ; Nepal, 54; China, 34; Japan, 1 1 ; Persia, 5; 

 Asia, 3: in all, 183. Africa and the Canary Isles ; ]3arbary 

 States, 1 3 ; Egypt, 3 ; Cape of Good Hope, 4 ; Canary Isles, 3 : 

 in all, 23. America; North America, 528; Mexico, 4; South 

 America, 22 ; Straits of Magellan, 6 : in all, 560. Australia 

 and Folijuesia : New Holland, 1; Van Diemen's Land, 2; New 

 Zealaiul, 1 : in all, 4. 



It would thus appear, that nearly half the foreign trees and 

 shrubs in the country have been introduced during the pre- 

 sent century ; and that these have been brought chiefly from 

 North America. Among them there are not more than 300 

 trees which attain a timber-like size, and of these by far the most 

 valuable is the larch. Some of the European acers, the sweet 

 chestnut, some oaks, some poplars, pines, and firs, and the })la- 

 tanus and cedar from Asia, are also valuable as timber trees ; 

 but the chief accessions to this class are the acers, oaks, elms, 

 ashes, poplars, birches, pines, and firs of North America. Oiu' 

 principal fruit trees- are fron) Asia, including the conunon walnut, 

 which is both a fruit and a limber tree ; but by far the finest 



