126 HISTORY AND GEOGRAPHY OF TREES. PART I. | 
There were introduced There were introduced 
from the year to the year Species. from the year to the year Species, 
1548 1691 1700 24: 
1551 1560 1 1700 1710 12" 
1561 1570 18 1711 1720 12 
1571 1580 3 1721 1730 44 
1581 1590 2 1731 1740 69 
1591 1600 48 1741 1750 21 
1601 1610 1 1751 “SP F760 77 
1611 1620 i 1761 1770 58 
1621 1630 22 1771 1780 mar fo 
1631 1640 27 1781 1790 49 
1641 1650 4 1791 1800 45, 
1651 1660 shy 1801 1810 93 
1661 1670 7 1811 1820 364 
1671 1680 1 1821 1830 242 
168] 1690 27 
The numbers, taken by centuries, are, in the 16th century, 89; 
in the 17th, 131; in the 18th, 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, consequently, 
have not yet been recorded in books, about 1400. 
The countries from which these 1300 species have been intro- 
duced appear, from the Hortus Britannicus, 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. Asta; Siberia, 69; Asia Minor, 3; 
East Indies, 4; Nepal, 54; China, 34; Japan, 11; Persia, 5; 
Asia, 3: in all, 183. Africa and the Canary Isles: Barbary 
States, 13; 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 Polynesia: New Holland, 1; Van Diemen’s Land, 2; New 
Zealand, 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 pla- 
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. Our 
principal fruit trees are from Asia, including the common walnut, 
which is both a fruit and a timber tree; but by far the finest 
a 
