Iv] GRASSLAND ASSOCIATIONS 127 
SPECIES OF THE CALCAREOUS GRASSLAND 
AND THE SILICEOUS GRASSLAND 
The following is a fairly complete list of the plants inhabit- 
ing the two groups of associations, calcareous grassland and 
siliceous grassland of the southern Pennines :— 
Calcareous | Siliceous 
grassland | grassland 
Lycopodium Selago vr vr 
L. clavatum vr vr 
Ophioglossum vulgatum la la 
Botrychium Lunaria r to o r 
Pteris aquilina r r to ls 
Lomaria spicant _ ) 
Cystoperis fragilis! 1 — 
Phegopteris Robertiana? ] — 
Asplenium viride! vr -- 
A. Trichomones?! la — 
A. Adiantum-nigrum! l — 
Nephrodium montanum? _ la 
N. aristata _ lo 
Salix repens? _ vr 
S. aurita? a ] 
Quercus sessiliflora (dwarfed) — l 
Betula pubescens (dwarfed) — l 
Corylus Avellana 1 ! 
Rumex Acetosella r o toa 
R. Acetosa re) r to o 
Dianthus deltoides 1 vr 
Spergularia rubra — r 
Arenaria verna la — 
A. serpyllifolia la vr 
Sagina nodosa® r vr 
Stellaria Holostea lo lo 
S. graminea te) lo 
Trollius europaeus® 1 vr 
Ranunculus repens? la la 
R. acris ) ] 
R. bulbosus a r 
Thalictrum minus r — 
Cochlearia alpina r — 
Thlaspi virens r — 
“T. sylvestre” r — 
Sisymbrium Thalianum l vr 
Cardamine hirsuta ] — 
Draba muralis? r — 
D. incana! vr = 
Erophila verna la vr 
