GEOGRAPHICAL DISTRIBUTION. 383 
regions ; while Campyloneuron, Phlebodium, Goniophlebium, 
and Polypodium, are, with a few exceptions, natives of the 
Western, 
It is very remarkable that genera with single species, 
such as Matonia, Peranema, Lozoma, Dictyoxiphium, and 
Trichiocarpa are found only in very limited areas; while, 
on the other hand, two Ferns of special habit, Didymochlena 
truncatula and Oleandra nertiformis, are found in the tropical 
regions of both hemispheres. The small Island of St. 
Helena contains 25 species, of which 13 have been found 
nowhere else, 
Besides the above conclusions arrived at by Mr. Baker, 
another view of the number of species found in different 
countries is derived from local “ Floras " and * Catalogues,” 
of which the following are the principal; it must, however, 
be understood that many of the species found in one 
. country are also common to other countries :— 
. Great Britain and Ireland, 36. 
Europe. Sadler and other authors, 67. Boies 
Asia Minor and Syria, 25. All European. 
India. Wallich's MS. Catalogue of the Plants of India, 
475. 
India. Hooker and Thomson’s Collection (J. Smith's 
MS. List), 819. 
Ceylon. Thwaites’ Flora, 214. 
Mauritius, Prof. Boutan's List, 235. 
_ China and Japan, 118. 
p Japan alone. A. Black's Enumeration, 82. 
Hong Kong. Benthem’s Flora, 76. 
. Java. Blume's Enumeration, 460. 
x . Philippine Islands. J. Smith's Enumeration, 297. 
E Fiji Flora Vitiensis Seemann's, 185. 
