INDEX 



375 



Petals, 173 

 Petastites, 265 

 Phaeophyceae, 69, 77 

 Phalloidaceae, 97 

 Phanerogams, 171-218 

 Phascacoar-, 138 

 Phycocyanin, 24 

 Phycornycetes, 102 

 Physcia parietina, 115-117 

 Phytophthora infestans, 93 

 Picea, 188, 306 



excelsa, 181-185, 188 

 Pileus, 109 

 Pillwort, 156 

 Pilularia, 156 



globulifera, 156 

 Pimpernels, 215 

 Pinaceae, 186 

 Pine, Aleppo, 190 



Corsican, 190 



Mountain, 190 



Weymouth, 190 

 Pineapple, 202 

 Pines, 180, 188, 245 



Japanese Umbrella, 187 



Kauri, 233 

 Pinguicula, 290 



vulgaris, 290 

 Pinks, 213 

 Pinnae, 146 

 Pinnatiiid, 146 

 Pinnularia viridis, 31 

 Pinus, 189 



Coulteri, 190 



halepcnsis, 190 



larico, 190 



longifolia, 190 



montana, 190 



Pinea, 190 



strobus, 190 



sylveslris, 185, 189 

 Pistil, 173 

 Pitcher Plants, 286 

 Pith, 205 

 Pityeae, 231 

 Placenta, 212 

 Plankton, 76 

 Plantago, 308 



major, 277 

 Plantain, Broad-leaved, 277 

 Plantains, 308 



Water-, 199 

 Plant-Associations, 359 



Plant-communities, 358 



classification of, 358 



-formations, 359 



-hairs, 284-285 



-Societies, 359 

 Plants, growth of, 274 

 Plasmodium, 9 

 Pleurococcus, 116 



vulgaris, 55 

 Plumbaginales, 215 

 Plumule, 204 

 Poa alpina, 301 

 Poisonous plants, 342 

 Pollen, 172, 315 



of anemophilous plants, 306 



-tube, 175, 177, 179 

 Pollination, 182, 301 



by birds, 322 



by insects, 192, 310 



by snails, 322 



by water, 303 



by wind, 304 

 Pollinia, 321 

 Polycarpieae, 212 

 Polypodiaceae, 154, 229 

 Polyporus squamosus, 94 

 Polytrichum commune, 267 

 Pondweed, 196, 305 



curled, 301 



horned, 196 

 Poplar, Black, 211 



Lombardy, 211 



White, 211 

 Poplars, 210, 304 

 Poppies, 213, 342 

 Poppy, capsules of, 329 



Opium, 337 



Yellow-horned, 360 

 Populus alba, 211 



nigra, 211 



pyramidalis, 211 



tremula, 211 

 Pc/oxyleae, 231 

 Polamogeton, 196 



crispus, 301 

 Potato, 19, 299, 337 



-disease, 93 

 Poterium sanguisorba, 309 

 Prickles, 344 

 Prickly Mountain-Moss, 163 



Pears, 263 

 Primordial utricle, 35, 40 

 Primrose, 205, 208, 215, 277 



