INDEX 



457 



Phajus, 245 



Phalaris, 379, 398, 400 



Phosphorus, in proteicls, 143, 188 ; 

 mode of absorption of, 150 ; asso- 

 ciated with nucleus, 189 



Photo-epinasty, 364 



Photosynthesis, 164 ; theories of, 

 165 ; not carried out by fungi, 172 



Phototaxis, 380 



Phototonus, 359 



Pinguicula, 206 



Pitcher-plants, see Insectivorous 

 plants 



Planogametes, 422 



Plantago, 441 



Plasmatic membranes, 6, 57, 59 



Plasmodium of Myxomycetes, 4, 9, 

 347 



Plasmolysis, 59 



Plastids, 5 



Polar nuclei, 432, 444 



Pollen grain, germination of, 443 



Pollen tube, 436 



Pollination, 437 ; methods of, 438 



Polygamous plants, 441 



Polygonum, photo-epinasty of, 364 



Polymerisation of aldehydes, 166, 

 167 



Polytrichum, 26 



Porlieria, 392 



Positive pressure of gases in inter- 

 cellular reservoirs, 117 



Potamogeton, 31 



Potassium, in ash, 143, 188 ; con- 

 dition of, in soil, 150 ; mode of 

 absorption of, 190; function of, 

 191, 192 



Potometer, 97 



Predominant form of plants in 

 different groups, 428 



Prepotency, 442 



Primula, 283 



Procarpium, 424 



Protandry, 440 



Proteids, 173 ; composition of, 174 ; 

 crystals of, 174; reactions of, 174 ; 

 coagulated, 177; construction of, 

 178, 182; translocation of, 229, 

 232 ; storage of, 230 



Proteolytic enzymes, 262, 265 



Proteoses. 176 



Protococcus, 9 



Protogyny, 440 



Protoplasm, composition of, 6 ; 

 movements of, 6, 351 ; properties 

 of, 12 ; continuity of, through 

 cell-walls, 15, 404 ; regulation of 

 osmosis by, 60, 101 ; relation of, 

 to respiration, 127; nutritive sub- 



stances for, 134 ; fermentative 

 activity of, 257, 269, 302; per- 

 meability of, by water, 352, 403 



Protoplasts, structure of, 2 ; arrange- 

 ment of, in multicellular plants, 3 



Prunus, 87, 267 

 | Prussic acid, 252 

 i Pseudopodia of Myxomycetes, 4, 347 



Pulvinus, 62, 355, 376, 389 



Pythium, 424 



V 



Kadiation, 291, 325 



Kaffinose, 247 



Rafflesia, 219 



Raphides, 287 



Kectipetality, 319 



Reflex action, 405 



Rennet, 262, 267 



, Reproduction, 411 ; relation to 

 growth, 412; vegetative, 417; 

 asexual, 418 ; sexual, 421 



Reserve materials, 236 



Reservoirs, of air, 106 ; of food, 138, 

 237 



Resin, 282 



Respiration, gaseous interchanges 

 of, 121 ; masked by photosyn- 

 thesis, 122 ; loss of weight in- 

 volved in, 122 ; intensity of, 123 ; 

 nature of the process of, 126 ; 

 relation of, to metabolism, 127 ; 

 influence of external conditions 

 on, 129 ; of seeds, 130 ; a source 

 of energy, 298 ; intramolecular or 

 anaerobic, 301 



Respiratory quotient, 124 



Rhamnase, 262, 267 



Rhamnus, 267 



Rhodophycece, 424, 427 



Rhythm, of root-pressure, 83 ; 

 nature of, 353 ; affected by stimu- 

 lation, 395 ; induced, 895 



Ricinus, 190, 239 



Ripening, 446 



Robinia, 62 



Root-hairs, 68 ; action of, 69 



Root-parasites, 214, 343 



Root-pressure, 71, 81, 82; rhythm 

 of, 83, 87 ; method of measuring, 

 84, 87 ; amount of, 85 ; perio- 

 dicity of, 87 



Rush, construction of stem of, 110 



Saccharomyces, see Yeast 



SACHS, on theory of transport of 

 water in wood, 79 ; on a method 

 of estimating rate of transpiration 

 current, 81 



