310 



INDEX 



leaf xerophytes, other, 159 



xerophytes, types of, 156 

 leaves, outline, size and thickness of, 



178 

 Lecanora, 215 

 legume, 132 

 Leguminosoe, 105 

 Lemna, 167, 168 

 Lemnacece, 167 

 Lepidium, 229 

 leucoplasts, 80 



act .on of, 85 

 levels, invasion at different, 272 

 lichens, 105 

 light, 5, 63 



action on chloroplasts, 85 



adaptation to, 171 



amount absorbed, 77 



comparison with standard, 75 



competition for, 253 



functions, 71 



intensity, 72, 75, 76 



intensities in forests, 230 



measurement of, 72 



readings, 74 



reception and absorption, 77 



relation of organs to, 171 



relation of plants to, 71 



standard, making a, 73 



stimuli, 72 



types of leaves, 182 

 LigulifloreB, 121 

 line transect, 210 



Linnffius, on genera and species, 187 

 lipase, 100 

 list quadrat, 204 

 Lithaspermum , 120, 228 

 Lomatium, 226, 293, 294 

 loment, 132 

 Lonicera, 126 

 lophospores, 242 

 Ludivigia, 169 



lumbered areas, succession in, 282 

 Lygodesmia, 163 



Machcer anther a, 178 



aspera, 125, 130, 179 

 magnesium, 19 

 major quadrat, 204 

 maltose, 101 

 Malva arborea, 67 

 man, agent in migration, 246 



succession due to, 280 

 mapping quadrat charts, 206 

 maps, formation, 213 

 Matthews, 189 

 maximum temperature, 95 

 Mentzelia, 239 

 Meriolix, 293 

 meristem, 106, 107 



Mertensia, 158 



linearis, 158, 164 

 Mesembryanthemum, 160 

 mesenchym, 41 

 mesophytes, 155, 164 

 mesophytic formations, 233 

 Micrampelis, 141, 142 

 migration, 99, 220, 237, 240, 270 

 agents, constant, 248; intermit- 

 tent, 248 

 agents of, 244, 248 

 circle, 212 

 determinate, 249 

 direction of, 250 

 indeterminate, 250 

 modifications for, 242 

 Mimosa piulica, 142 

 minimum temperature, 95 

 mixed aggregation, 239 

 mixed formations, 235 

 mixotrophic plants, 104 

 mobility, 241 



and nearness, 284 

 modification, 4 



modifications for migration, 242 

 modifying factors, 15 

 Moneses uniftora, 128 

 monochnism, 122 

 monocotyledons, 53, 170, 172 

 Monotroia, 104 

 monotropic, 201 

 mortar fruits, 247 

 motility, 241 

 mountain zones, 303 

 movements of fruits, 132 

 of stems and leaves, 87 

 Muhlenbergia, 162, 165 



gracilis, 296 

 mutants, 196 

 mutation, 190 



origin by, 196 

 mutualisni, 104 

 mycorhiza, 105 

 Myriophyllum, 168 



natural selection, 189, 191, 196, 198 

 nature of competition, 252 

 Naudin, 189 

 nectar flowers, 127 

 needle form, 161 

 night-bloomers, 120, 130 

 nitrates, 19 

 nitrogen, 18, 101 



bacteria, 105 

 Nobbe, on root areas, 44 

 non-available water, 9, 14 

 normal alternation of formations, 

 292 



alternation of species, 293 



leaf xerophytes, 157 



