Page:Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne (1867).djvu/57

Rh Rising to the upper levels, it is usually with the limestone that the common plants of dry grassy situations reach their highest points. In the list of species it will be seen how often the most elevated points at which these have been noted are in connection with the Main Limestone of Allendale, Harwood-dale, and the Weardale "Hopes;" whilst the arenaceous peaks and ridges present everywhere what a botanist on the outlook for rarities is apt to consider a monotonous repetition of heather, and the other common gregarious swamp-heather-land plants which have been already noticed in the account of Simonside.

The following is a list of all the species seen within the bounds of the upper zone on Kilhope Law, and it might stand, with very trifling variation, for any other of the higher peaks and ridges of this character.

M. Thurmann has given for a portion of Central Europe a full list of the indigenous plants, and an account of their distribution with regard to the subjacent rocks. In Central Europe there are two extensive ranges of hill, of well-marked contrasting lithological character, the dysgeogenous Jura, and eugeogenous Vosges. Comparing the British flora as a whole with that of this region, and, indeed, with that of any other part of Central Europe, we see, even by glancing over the mere list of names, how conspicuously with us the damp-loving element predominates. He gives for the rocks of each class a list of the fifty