378 



INDEX 



Liverworts, 313 



Living organisms, as environmental 



factors, 171 

 Lycoperdales, 302 

 Lycopodiales, 335 

 Lycopodineae, 334 

 Lycopodium, 334, 335, 336 

 gametophyte of, 336 



M 



Macrocystis, 278 



Magnesium, importance of, 31 



in chlorophyll, 70 

 "Male" flower, 192 

 Malpighi, 5 

 Maltase, 124 

 Manufacture of food, in green 



plants, 69 

 Maple, six species of, 258 

 Marchantia, 314, 315 

 Marchantiales, 313 

 Maximum, as of temperature, etc., 



157 

 Membrane, cytoplasmic, 52 



osmotic, 48 



permeability of, 49 



semipermeable, 50 

 Mendel, 211, 212 



methods of, 211 

 Mendelian ratios, 218 

 Mendel's law of inheritance, 7, 211- 



223 

 Meristem, 142 

 Mesophyll, 65, 66 

 Mesophyte, 167 

 Metabolism, 117-133 



constructive, 117 



destructive, 117 

 Metaphase of mitosis, 140 

 Microorganisms, in soil, 31 

 Micropyle, 197, 199 

 Mildews, 295 

 Milk, souring of, 133 

 Milkweed, fruit of, 200 

 Mineral nutrients, 31, 118 

 Minimum, as of temperature, etc., 

 157 



Mistletoe, as parasite, 172 

 Mitosis, 139, 140, 187 



significance of, 141 

 Modern Period, 5 



Moisture, as environmental factor, 

 163 



effect of, on structure, 164 

 Molds, 289 

 Monocotyledons, 361, 364-366 



embryo of, 198, 199, 361 



flower of, 186, 361 



stem structure of, 103, 104, 361 

 Monoecious, 192 

 Monotropa, 174 

 Morels, 294 



Morinda, pollen of, 186 

 Morphology, 3 



experimental, 3 

 Mountain ash, leaf of, 64 



laurel, flower of, 195 

 Mucorales, 290 

 Mulch, 28 

 Multicellular sexual organs, 312 



plant, origin of, 245 

 Mushroom, 299, 300 

 Mutation, 222, 223-225, 238 



in Boston fern, 223 



in tobacco, 222 



origin of cultivated plants by, 224, 

 225 



theory, 238 

 Mycelium, 285 

 Mycorrhiza, 34, 175 

 Myriophylliim, stem structure of, 

 167 



N 



Naked flower, 192 

 Names of plants, 260 

 Natural Selection, 235 



objections to theory of, 237 

 Neck, of archegonium, 312 

 Neck-canal cells, 312 

 Nectar, 194 

 Nectary, 191, 194 

 Nemalion, 282, 283 

 Nereocystis, 278 



