510 



INDEX OF PLANT NAMES 



Orchid, water storage, i6i ; assimi- 

 lating roots, 198 ; mycorhiza, 

 244, 250-252, 313 ; poUinia, 

 345 ; nectar, 257, 359, 360 ; 

 pollination, 387, 398 ; self- 

 sterility, 392, 393 ; fall of 

 corolla, 403 ; fruit, 407 ; 

 seed, 251, 414, 423 



Orchis, 26, 407, 251 



, bee, 65 



, bird's-nest, 240, 243 



, coral-root, 240 



— latifolia, 359 



maculata, 251 



mascula, 251 



- — - — morio, 359 



Orobanche, 231, 239 



caryophyllacea, 23 1 



major, 231 



rubra, 231 



Orobus tuberosus, 257 



Osyris alba, 221 



Oxalis, leaf orientation, 124 ; as- 

 similation, 151, 152 ; leaf 

 movement, 187 ; seed dis- 

 persal, 410 ; seed vitality, 

 419 



Acetosella, 309, 397 



hedysaroides, 206 



Pi^ONiA tenuifolia, 346 

 Palm, leaves, 292 ; pollination, 382 ; 

 germination, 433. 435 



, coconut, 158 



, date, 345 



, rambling, 304 



, Rotang, 304, 305 



Papaver Rhoeas, 394 

 Parietaria, 331, 347 



lusitanica, 413 



officinalis, 344 



Paris quadrifolia, 26, 423 

 Parkinsonia, 161, 221 

 Parsnip, 25 

 Passerina, 189 

 PauUinia, 305 

 Pavetta, 264, 266 



fulgens, 347 



javanica, 347 



Zimmermanniana, 265 



Pea, roots, 24, 25, 40 ; toxic salts, 



64 ; root secretions, 69 ; para- 

 sitic, 238, 239 ; and organic 

 food, 243 ; root tubercles, 

 258, 262 ; rogue, 395 ; clei- 

 stogamy, 397 ; seed vitality, 

 421 ; germination, 432-434, 

 438 ; growth, 44^-443 



Pea, sweet, 300 

 Peach, 172, 455 

 Pear, stomatal movement, 172 ; as 



host, 225 ; stone cells, 286 ; 



sterility, 392 

 Pedicularis, 219, 220, 239 

 Pelargonium, root, 44 ; guard cells, 



109 ; effect of peat, 192 

 Pellitory, wall, 344 

 Penicillium, 246 

 Peony, 367 

 Peperomia, 161, 162 

 Periwinkle, 118, 462 

 Persicary, amphibious, 293 

 Petunia, 433 



Phacelia tanacetifolia, 426, 429 

 Phacellaria, 221 

 Phajus, 72 

 Phalasnopsis, 251-253 



violacea, 403 



Phaseolus, 44, 136 



multiflorus, 134, 436 



— vulgaris, 53, 436 



Pheasant's eye, 350 



Phelipaea, 231 



Philadelphus, 118 



Philodendron melanochrysum, 302 



Phleum, 384 



Phlomis pungens, 214 



Phoma, 248 



Phoradendron, 226-228 



Phragmites communis, 308 



Phyllocladus, 264, 406 



Physalis, 161, 173 



Picea, 45 



excelsa, 26 



Pilea nigrescens, 88 



Pilostyles, 234 



Pimpernel, scarlet, 349, 351, 403, 



405 

 Pine, roots, 26, 28 ; sun and shade 

 leaves, 155 ; oil, 185 ; 

 leaves, 187 ; conductivity of 

 wood, 188 ; ash content, 

 208 ; as host, 225 ; myco- 

 rhiza, 245, 246; pollen 

 tube, 353 ; pollen, 376-378 ; 

 seed dispersal, 414 ; adult 

 leaves, 445 ; reproduction, 



457 



, maritime, 66 



, Monterey, 227 



Pine-apple, 74, 75, 406 

 Pinguicula, 267, 276, 277, aSi, 

 282 



\ailgaris, 276 



alpina, 359 



Pink, clove, 357 



