260 APPENDIX. — NO. II. 



terior ones ; but it*may be proper to state, that Greenland 

 and Iceland are referred to E. America, the Levant to E. 

 Europe, and the Crimea to W. Asia. In the figures, 1 

 answers to W. Europe, and 9 to E. America ; the inter- 

 mediate numbers correspond to the intermediate belts 

 or divisions. 



That this Table professes to be either complete or free 

 from inaccuracies let no reader imagine. It is impossible 

 at the present day for any one to complete such a table ; 

 and it is necessarily liable in no trifling degree to the usual 

 errors of compilations from a great variety of authorities 

 of unequal value.* It can be regarded only as an ap- 

 proximation towards a picture of the geographical exten- 

 sion of the plants named. The latitudinal zones are 

 abbreviated to the three first letters; and the use of 

 italics indicates a presumption that the species is not indi- 

 genous in the zone. 



* Botanists, whose attention is limited to the plants found in Bri- 

 tain, may form some idea of the difficulty of tracing their distribution 

 abroad by means of Floras, often of very different eras, when they see 

 that in two British Floras, published almost together (by Dr. Lindley 

 in 1829, and by Dr. Hooker in 1830), near 200 species do not cor- 

 respond, either from difference of names, or from being sunk into varie- 

 ties by the one or other author. The misapplications of names, by 

 no means unfrequent, cause yet more difficulty than the changes. 



