232 INDEX 
Marshy places in the ash woods, 72 
oak woods, 53 
Meso-pteridetum, 57 
Mild humus, 54 
Millstone grit, 7, 13 
Mineral Salts, 7, 8 
to flora and vegetation, Relation 
of, 161 
Mixed calcareous grassland, 121 
plant associations, 21 
siliceous grassland, 112 
Molinia grassland, 114, 215, 216, 219 
Moliniétum caeruleae, 114, 215, 216,219 
Moor formation, Species of the, 197 
Moorland associations, 163 
Classification of, 166 
Moorland, Changes in the habitat of 
the, 93, 175 
plants, Roots of, 174 
Moors and fens, 170 
Bilberry, 166, 182 
British, 166, 220 
Bryophytes of the, 172 
Cotton-grass, 166, 167, 183 
Firing of the, 178 
Heather, 166, 176 
Moss, 183 
Origin of the, 94, 98, 181, 186, 194 
Rainfall of the, 175 
Reservoirs on the, 213 
Retrogressive, 166, 188 
Rhacomitrium, 167 
Scirpus, 167 
Species of the heather, 179, 180, 197 
Sphagnum, 166 
Transitional, 166 
Mountain or Carboniferous limestone, 
8, 12, 6 
Nardetum strictae, 108 
facies of, 108 
Nardus grassland, 106 
Nature of cultivated land, 199 
Neutral grassland, 105 
Nomenclature, Ecological and Phyto- 
geographical, 19, 61 
Non-calcareous or siliceous soils, 8, 
12, 14 
waters, 146 
Oak and birch woods, 60 
Pedunculate, 47 
Sessile-fruited, 47 
Oaks from the Ash woods, Absence 
of, 70 
Oak woods, Damp places in the, 54 
Dry places in the, 55 
Ground vegetation of, 53 
Herbaceous vegetation of, 53 
of Quercus Robur, 44 
Quercus sessiliflora, 46, 61, 215 
Transitional, 45 
Trees and shrubs of the, 47 
Variation of Vegetation in, 53 
Oats, Cultivation of, 205 
Open plant associations, 20 
Origin of the cultivated land, 199 
moors, 94, 98, 181, 186, 194 
peat, 8 
scrub, 91, 94, 98 
Oxodion, 167, 216, 217 
Passage associations, 125 
Past and present upper altitudinal 
limit of trees, 88 
Pasture, Permanent, 105, 202 
Peak District, General Description of 
the, 1 
Geology of the, 5 
Peak of Derbyshire, 1, 189 
Derbyshire, Vegetation of the sum- 
mit of the, 189 
Peat and Geological Maps, 12 
Bare, 191 
Buried timber in, 90 
Depth of, 173 
Fen, 168, 170 
moors, 168, 170 
moors, Altitude of, 174 
Origin of, 8 
Pine in the, 47, 89, 91 
Sand and Humus of, 173 
Utilization of the, 213 
Pendleside (or Yoredale) rocks, 7, 13 
Permanent pasture, 105, 202 
Petrophytes, 143 
Phytogeographical nomenclature, Eco- 
logical and, 19, 61, 95 
Pine, 70 
in the ancient birch woods, Scots, 
48, 64 
in the peat, 47, 89, 91 
Plant associations, 19 
communities, 17, 19 
federation, 110 
formations, 19 
extent of, 21 
life history of, 21 
societies, 19 
Plantations, 209 
Derelict, 210 
Poplars, 48, 70 
Primitive birch forest, 63 
Progressive associations, 20 
and retrogressive scrub, 97, 98 
Pseudo-calcareous heaths, 126 
Pure plant associations, 21 
Quercetum roboris, 44, 220 
sessiliflorae, 61, 46, 219 
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