424 



INDEX. 



Mineralization 7 



Mnium 381, 405 



Moisture, effect on growth 186 



Monopodial branching, of root 

 7S; of shoot 87 



Monostroma 26 



Monotropa, pollen tube 283 



Morchella, fructification 286 



Morning glory, chloroplasts 4; 

 seedling US 



Mosaic, leaf 195, 106 



Mosses 53, 3S1; brood buds.?'/'.'; 

 sporangium 229; teeth 355; 

 sporophyte 822 



Mossworts, ovary 289; sper- 

 mary 2S0 



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 41, 403; sporangium 222 



Mulberry 306; flower and fruit 

 305 



Mushroom 377, 404; gill SI? 



Mustard seedlings, geotropic/.%? 



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, ."■> 



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 824 



Oleaster, scales 822 



Oligotrichum, leaf 56 



Onion, embryo 56; stem 106 



Oogonium 287 



Opuntia 321 



Orange, oil receptacle 177 



Orchid, chromoplast 6; light 

 seeds 363; mycorhiza 886 ; 

 pollen tube 283 



Organ 143 



Origin of roots 79 



Orthotrichum, branching 57 



Oscillaria 10, 370, 401 



Osmosis 156 



Ovary 240, 273, 286 



( Hulury 240 



Ovules 237, 242, 243, 244; dia- 

 grams 285 



Oxalis, cells 102 



Oxygen, effect on growth 186; 

 supply 171 



Pansy, seed 300 



Parasites 43, 161, 163 



Parasitism 333, 338 



Parmelia, thallus 825 



Pea, flower 255; growth of root 

 182 ; leaf tendrils 130 ; root 

 branches 79; sweet 407 



Pellia, sperms 280 



Peperomia, water storing 326 



Pepper, fruit 800 



Perennials in 



Perianth 236, 252 



Pericarp 300; adaptations to 

 distribution of seeds 3(12 



Pericycle, root 71 ; stem 100, 

 103' 



Periderm, root 74, 75; second- 

 ary in; stem 109 



Perisperm 29S, 299 



Peronospora, haustoria 46; sex 

 organs 87? 



Petal 237 



Petiole 122; scarlet runner 105', 

 sensitive 128; structure 132 



Peziza 223, 376, 404 



