796 



received without additional authority. The stations on the borders 

 of the East Highlands, and perhaps those among the hills of Derby- 

 shire, carry its range almost within the superagrarian zone. I have 

 not so indicated the zonal range, because those northern localities 

 seem quite restricted to the coast line, where the climate is hardly 

 that of the upper zone." 



Explanation of the foregoing. 



" The first line shows, by their numbers, the provinces within which 

 the species has been ascertained or reported to grow. The uninclosed 

 numbers show those provinces in which it is so far wild or established 

 as to be fairly considered a British species — native, denizen, or colo- 

 nist, as presently to be explained. The numbers which are enclosed 

 by curves, thus ( ), will indicate the provinces within which the spe- 

 cies can scarcely yet be deemed really wild, although existent there. 

 Those numbers which are enclosed by angles, thus [ ], will refer to 

 the provinces within which the species has been reported to occur, 

 although under circumstances of doubt which render some confirma- 

 tion necessary ; most of the provinces so distinguished being probably 

 erroneous. 



" The second and third lines give the north and south limits of the 

 species in Britain, by naming those counties in which occur their ex- 

 treme localities. The selection of counties to be cited is made with 

 reference both to the east and the west sides of the island ; whereby 

 to convey some idea of the relation of the species to longitude also. 

 Thus, for instance, the county of Glamorgan is named in the north 

 limit of the Clematis ; although the other two counties, Salop and 

 Norfolk, are much more northerly. This is done, because, so far as 

 yet ascertained, the county of Glamorgan is the north limit of the 

 Clematis in the longitude of Wales ; the alpine character of the two 

 Welch provinces being unfavourable to a shrub which requires a 

 warm summer. Our lists of Cornish plants being yet very incomplete, 

 Devon will be named as the south limit of many species which doubt- 

 less do grow also in Cornwall. 



" The fourth line is devoted to a sort of census of the species. This 

 can only be given approximately, by estimating the number of pro- 

 vinces and of counties within which the species is deemed likely to 

 occur. It is probable that the number of provinces will be set down 

 correctly for the majority of the species ; though there may still remain 

 a considerable minority, for which the number of provinces will ulti- 

 mately be found less exact. The lists of species for South Wales, 



