150 VEGETATION OF THE PEAK DISTRICT [CH. 
Holcus lanatus ry) C. ampullacea vr 
Molinia caerulea l Juncus effusus ls 
Glyceria fluitans r toa forma compactus ls 
Scirpus setaceus 1 J. inflexus 
Eriophorum angustifolium U (=J. glaucus) lr 
Carex ovalis r to o|| J. sylvaticus 
C. echinata a (=J. acutiflorus) ls 
C. paniculata vr || J. lamprocarpus a 
C. Goodenoughit l J. supinus la 
C. flacea fo) J. squarrosus l 
C. pallescens vr Luzula multiflora la 
C. panicea ) forma congesta 0 
C. pendula vr || Narthecitum Ossifraguin y 
“C, strigosa”’ vr Iris Pseudacorus lr 
C. helodes Orchis latifolia ? 
(=C. laevigata) la O. maculata 2 
C. binervis ) O, ericetorum ) 
C. fulva r 
C. flava la 
forma oedocarpa 
(=C. flava var. minor) la 
CALCAREOUS WATERS 
The composition of the calcareous waters may be inferred 
from the following analyses of the waters of the Carboniferous 
Limestone area of the mid-Pennines published by Mr Burrell 
(1900). It will be seen that the iron-content is practically the 
same as that of the non-caleareous waters, but that the lime- 
content is considerably higher. The magnesium-content is also 
high; and this fact has possibly some significance. It seems to 
be the case generally, although perhaps not so universally, that 
natural waters with a high lime-content have also a high general 
mineral-content, and conversely that waters with a low lime- 
content have also a low general mineral-content; and it is by 
no means improbable that the so-called lime-loving species are 
plants which prefer, not merely the lime, but the high mineral- 
content in general. However, in the absence of experimental 
work bearing specially on this point, no positive statements can 
be made; though Graebner (1909) bases a classification of the 
vegetation of Germany on an assumption, by no means an 
unreasonable one, which is nearly the same as this one. 
