INDEX 



399 



Ophioglossales, 257, 352 

 Ophioglossum, 352 

 Opiliaceae, 371 

 Opposite leaves, 292 

 Opuntia, 310, 370 

 Orchidaceae, 360 

 Orchidales, 299, 360 

 Orchids, 299, 360 

 Orchis, 299, 361 

 Orders, 159 

 Oreodoxa, 358 

 Organic Acids, 140 

 Origin of Phyla, 161 



of Zygophyceae, 181 

 Orobanohaoeae, 321, 367 

 Orthotrichaceae, 350 

 Orthotrichum, 350 

 Oryza, 359 

 Oryzeae, 359 

 Oscillatoria, 165, 330 

 Oscillatoriaceae, 165, 330 

 Osmosis, 72 

 Osmunda, 352 

 Osmundaceae, 352 

 Ostrich-fern, 259 

 Ostropaceae, 343 

 Ostrya, 372 

 Ovary, 286, 292 

 Ovulate, 275 

 Ovule, 273 

 Oxalic acid, 141 

 Oxalidaceae, 362 

 Oxalis, 326, 362 

 Oxidases, 153 



Padina, 337 

 Palea, 297 

 Palet, 297 

 Palisade tissue, 292 

 Palmaceae, 358 

 Palmales, 296, 358 

 Palmatin, 143 

 Palmellales, 171, 332 

 Palmettos, 300 

 Palmitic acid, 140, 143 

 Palms, 296, 358 

 Panax, 372 

 Pandanaceae, 357 

 Pandorina, 172, 332 



Paniceae, 359 

 Panic Grasses, 359 

 Panioum, 359 

 Pannariaeeae, 340 

 Pansy, 306 

 Papaver, 364 

 Papaveraceae, 364 

 Papaws, 361 

 Pappus, 312 

 Parallel veined, 295 

 Paraphyses, 203, 215 

 Parasitic habit, 320 

 Paratheliaceae, 343 

 Paratonic movements, 123 

 Parenchyma, 29 

 Parental care, 110 

 Parietal placentae, 303 

 Parkeriaceae, 352 

 Parmelia, 216, 340 

 Parmeliaceae, 340 

 Paronychia, 364 

 Parsleys, 372 

 Parsnip, 311 

 Parthenocissus, 371 

 Parthenogenesis, 324 

 Passage of Water, 73 

 Passiflora, 364 

 Passifioraceae, 363 

 Passion Flowers, 363 

 Pastinaca, 311, 372 

 Patellariaceae, 342 

 Path of the Water, 75 

 Pathology, 133 

 Pea, 305, 308 

 Peach, 314 

 Pear, 313 



blight bacteria, 169 

 Peat-mosses, 251, 349 

 Pectase, 153 

 Pectose, 5 

 Pedaliaceae, 367 

 Pediastrum, 172 

 Pedicularis, 367 

 Peireskia, 370 

 Pelargonium, 306, 362 

 Pellia, 349 

 Peltigera, 340 

 Peltigeraceae, 340 

 Penaeaceae, 371 

 Penicillium, 222, 344 

 Penicillus, 195, 334 



