Page:The Botanist's Guide Through the Counties of Northumberland and Durham (Vol 1).djvu/18

Rh not only in number but in rarity of species, will be noticed by the most cursory observer to predominate in that part of the district: In the future researches of botanists, they therefore recommend the investigation of the west and north-west of Northumberland,—a tract of country hitherto but slightly explored, and of course the most likely field for new discoveries:. They must not however expect, that even Cheviot and its surrounding hills will ever be found to vie with Teesdale, whose mountains are in a great measure composed of extensive limestone ridges, which are well known to be propitious to the growth of alpine plants.—Cheviot on the contrary is a porphyritic mountain, densely clothed to its summit with coarse grass and rushes, to the total exclusion of more delicate vegetables.

The following habitats, which are given in Wallis's History of Northumberland, are worthy Rh