GEOGRAPHICAL BOTANY. 361 



stungen : in the Miinchener gelehrte Arizeigen fur 1841 

 and 1844, id. pp. 430 et seq.) 



It must first be remarked, in regard to the notice 

 given in the Annual Report for 1843, of the progress of 

 the author's Flora Japonica, that this work has indeed 

 experienced an interruption, but that by the completion 

 of the part which treats of the Conifers, the number of 

 this order found in Japan has been increased, far beyond 

 that previously given, i. e. to 30, which are distributed 

 through 14 genera. Zuccarini's present work contains a 

 catalogue of all the genera as yet known in Japan, with 

 the number of species in each family. The latter amount 

 in all to about 1650 species; but as Zuccarini estimates 

 the number of the Japanese plants contained in the 

 herbaria of the Netherlands at 2400 species, the sta- 

 tistics must ultimately be altered in proportion as the still 

 remaining families in V. Siebold's work are worked out. 

 With the proportional numbers of the genera and families 

 this will not be so much the case; hence Zuccarini's sketch 

 acquires a permanent value. He enumerates the following 

 as the most remarkable general results of his investiga- 

 tion : 1 . The large number of families of plants repre- 

 sented in Japan, of which, according to Endlicher's system, 

 there are 172. 2. The large number of genera in pro- 

 portion to the species, for 621 are already mentioned in 

 the catalogue, and probably 700 are contained in the 

 herbaria (it must, however, be remarked, that Zuccarini 

 has included the Chinese genera found in Beechey's 

 voyage, as also those from the Bonin Islands). 3. The 

 limitation of endemic genera to a single species, corre- 

 sponding to the monotypes of the Canary Isles; a condition 

 which applies to the greater part of the new genera from 

 Japan, whilst the remainder contain at present only two, 

 or, at the most, four or five species, and some mono- 

 types also of North America and India, and the European 

 Humulus, possess in Japan a second, but only a second 

 species. 4. The very large number of woody plants in 

 so high a latitude, both from woody families belonging 



