424 



INDEX. 



Mineralization 7 



Mnium 381, 405 



Moisture, effect on growth 186 



Monopodial branching, of root 

 78; of shoot 87 



Monostroma 26 



Monotropa, pollen tube 283 



Morchella, fructification 226 



Morning glory, chloroplasts 4', 

 seedling 118 



Mosaic, leaf 105, 196 



Mosses 53, 381; brood buds 26 J; 

 sporangium 229; teeth 355; 

 sporophyte 222 



Moss worts, ovary 289; sper- 

 mary 280 



Motor organs 192, 295 



Mountain ash, chromoplasts 6 



Mousetail, flower 259 



Movements 188; combined 196; 

 contact 203, 207; for entrap- 

 ping animals 345; of water, 

 effect on plants 328; para- 

 tonic 193; photeolic 206; spon- 

 taneous 193, 206; to protect 

 spores 352 



Mucor.^, 403; sporangium 222 



Mulberry 306; flower and fruit 

 305 



Mushroom 377, 404; gill 317 



Mustard seedlings, geotropic 198 



Mutualism 333 



Mycelium 41 



Mycorhiza 335, 336 



Myosurus, flower 259 



Nectar 176; guides to 359 



Nectaries 177 



Nemalion, ovary 288 



Nettle hair 348 



Nitella 27, 29 



Nitrogen, supply 342 



Nodes 96; of Chara 27 



Nostoc 9, 369, 401 



Noteroclada 54 



Nucleus 3 



Nutation 193 



Nutrition 151; of Oscillaria 10 



Oats, cell from leaf 4', epider- 

 mis 134. 



Odor, cause 176; purpose 359 



Offsets 90, 265 



Oils 176 



Oleander, leaf 324 



Oleaster, scales 322 



Oligotrichum, leaf 56 



Onion, embryo 56; stem 106 



Oogonium 287 



Opuntia 321 



Orange, oil receptacle 177 



Orchid, chromoplast 6; light 

 seeds 363 ; mycorhiza 3o6 ; 

 pollen tube 283 



Organ 143 



Origin of roots 79 



Orthotrichum, branching 57 



Oscillaria 10, 370, 401 



Osmosis 156 



Ovary 240, 273, 286 



Ovulary 240 



Ovules 237, 242, 243, 244; dia- 

 grams 285 



Oxalis, cells 192 



Oxygen, effect on growth 186; 

 supply 171 



Pansy, seed 300 



Parasites 43, 161, 163 



Parasitism 333, 338 



Parmelia, thallus 225 



Pea, flower 255; growth of root 

 182 ; leaf tendrils 130 ; root 

 branches 79; sweet 407 



Pellia, sperms 280 



Peperomia, water storing 326 



Pepper, fruit 300 



Perennials in 



Perianth 236, 252 



Pericarp 300 ; adaptations to 

 distribution of seeds 362 



Pericycle, root 71 ; stem 100, 

 103 



Periderm, root 74, 751 second- 

 ary in; stem 109 



Perisperm 298, 299 



Peronospora, haustoria 4G\ ?ex 

 organs 277 



Petal 237 



Petiole 122; scarlet runner 105; 

 sensitive 128; structure 132 



Peziza 223, 376, 404 



