222 APPENDIX. 



Numbers and Percentages of Species of Phanerogamic Plants extending to countries 



beyond America. 



Extra- America 



Widely 



Europe 



Mediterranean region 



Asia 



Eastern Asia only 



Africa and Mascarene Islands 



Australasia 



Antarctic region 



Polynesia 



Sandwich. Islands 



Galapagos Islands 



imber. 



Per cent. 





348 



10-1 of 3433* 



254 



73-0 of 348 



9 



2-6 





1 



0-3 





15 



4-3 





2 



0-6 





44 



12-6 





6 



1-7 





1 



0-3 





2 



0-6, , 





6 



1-7 





13 



3-7 





Concerning this Table, a few words of explanation may facilitate its ready compre- 

 hension. It is limited to the phanerogamic element, as the cryptogamic element is 

 not dependent on the same means and agencies of distribution. Out of a total of 

 11,626 species, 8193 (or 70-5 per cent.) are not known to occur outside of Mexico and 

 Central America. The first section of the Table shows the proportionate distribution 

 of all the species found within the different divisions of Mexico and Central America. 

 The second section shows the numbers and percentages of the species to other parts of 

 America, the total number being 3433, or 29'5 per cent, of our whole flora. The third 

 section shows the distribution of the species extending beyond America, the total of 

 which is 348, and all of which, as is demonstrated by the percentages given, occur in 

 some other part of America as well as within our limits. This is rather remarkable, 

 inasmuch as two of our genera, Abelia and Erblichia, are not found in any other part 

 of America ; but it should be mentioned that there are some divergences of opinion 

 respecting the latter genus which would materially affect the question of its geogra- 

 phical area. 



It will be perceived that 73 per cent, of the species ranging beyond America are 

 plants of wide distribution, and as such, by whatever means they became so, throw no 

 light on the problems of phyto-geography. The other elements of the extra- American 

 extensions are discussed in special paragraphs. 



* The total number of species found within our limits which also extend beyond. 



