INDEX 



457 



Ovule, Ephedra. 359 



Fritillaria, 390 



Lyginopteris, 314 



orthotropoup, 383 



Pinus, 345, 346 



Welwitschia, 358 



Zarnia, 326 

 Ovuliferous scale, 345, 346 



Palaeostachya, 258, 259 

 Pallavicinia, thallus, 179 

 Palmales, 407 

 Palmella, 26, 27, 32, 39 

 Pandanales, 406 

 Pandorina, 28, 29 

 Papaverales, 401 

 Parallel development, 413 

 Paramylon, 15 

 Paraphysis, Bryales, 200 

 Claviceps, 135, 136 

 Cutleria, 72 

 Fucus, 82, 83 

 Laminaria, 77 

 Nedria, 135 

 Physcia, 156 

 Plowrightia, 136, 138 

 Pyronerna, 130 

 Zonaria, 76 

 Parasite, 100 

 Parietales, 403 

 Parthenocarpy, 398 

 Parthenogenesis, 114, 397 

 Pediastrum, 33, 34, 35 

 Pelargonium, pistil, 382 

 Pellia, antheridium, 180 

 archegonium, 181 

 capsule, 182 

 thallus, 179 

 PelUcle, 14 



Penaea, embryo sac, 387, 388 

 Penicillium, 124, 125 

 Peperomia, embryo sac, 387, 388 

 Perianth, 373 



Periblem, 364, 365, 394, 396 

 Pericarp, 398 

 Perichaetium, 200 

 Peridium, 151 

 Perigyny, 375, 376 

 Periplasm, 116 

 Perisperm, 393 

 Perisporiales, 127 

 Peristome, 203, 204 

 Perithecium, 135 

 Claviceps, 136 

 Laboulbeniales, 140 



Perithecium, A^edria, 135 

 Neurospora, 139 

 Plowrightia, 138 

 Venturia, 138 

 Xylaria, 139 

 Peronosporales, 114 



summary, 117 

 Petal, 373' 

 Peziza, 132 

 Pezizales, 129 



summary, 133 

 Phaeocystis, 16 

 Phaeophyceae, 66 

 orders, 67 

 summary, 85, 94 

 Phaeothamnion, 16, 17 

 Phallaceae, 152 

 Phallus, 152 

 Phanerogam, 1 

 Phanerogamia, 1 

 Phellogen, 369 

 Phloem, 210 



elements, 369 

 Phycocyanin, 8 

 Phycoerythrin, 8, 85 

 Phycomycetes, orders, 108 

 summary, 157 

 Phycophyta, 2, 3, 7 

 Phylladinia, 127 

 Phylloglossum, 219, 220, 226 

 Phylogeny, 1, 144 

 Physcia, 155, 156 

 Phytophthora, 116 

 Pileus, 148, 149 

 Pilobohis, 120 

 Pilularia, 293, 294 

 Pinna, 278 

 Pinnidaria, 21 

 Pinnule, 278 

 Pinus, archegonium, 347 

 embryo, 351, 353 

 female gametophyte, 347 

 fertilization, 350 

 leaf, 343 



male gametophyte, 348 

 ovulate strobilus, 341 

 ovule, 346, 347 

 staminate strobilus, 345 

 stem, 344 

 Piperales, 399 

 Pistil, 373, 382 

 Placenta, 383 

 Plant life of the past, 4 

 Plantaginales, 405 

 Plasmodiophora, 112 

 Plasmodiophorales, 112 

 Plasmodium, 104, 254, 267, 287, 295, 381 



