INDEX 



633 



Nitrobacter, 83 

 Nitrogen cycle, 318, 319 

 Nitrosomonas, 82 

 Nodules, 83 

 Nomenclature, 4 

 Nostoc, 215, 333, 341 

 Nourishment, growth and, 123 

 Nuclear division, indirect, 184 

 Nucleolus, 1 6 

 Nucleoplasm, 16 

 Nucleus, 1 6 

 Nutrition theory, 91 



Osmosis, 55, 56 



demonstration of, 57 



importance of, 59 

 Osmunda cinnamomea, 159 



claytonia, 152, 160 

 Ostrich fern, 114, 178 

 Ovary, 436 

 Ovules, 436 

 Ovum, 170 

 Oxalis, 138 



bupleurifolia, 122 

 Oxidase, 79 



Oak, 34, 336 

 Oats, smuts of, 297 

 (Enothera, 470 



biennis, 471, 534 



brevistylis, 533 



gigas, 535, 53$ 



Lamarckiana, 532, 533, 535 

 Oleander, 39 

 Onagra, 470 

 Onagraceae, 470 

 Onion, 348 

 Onoclea, 172 



struthiopteris, 114, 178 

 Ontogeny, 504 

 Oosperm, 173 

 Operculum, 202 

 Ophioglossum, 178, 214 



vulgatum, 175, 177 

 Opuntia Blakeana, 342 

 Orange, 295 

 Orchidaceae, 497 

 Orchids, 327, 500, 501 

 Organic and inorganic, 69 

 Organisms, 8 

 Organs, 7 



essential, 448 

 Orobanchaceae, 338 



Paleobotany, 5, 578 

 Paleogeography, 584 

 Palisade, 35 

 Palmaceae, 495 

 Palmetto, sabal, 498 

 Palms, barragona, 498 



cocoanut, 497 

 Pandorina, 405 

 Pangens, 565 

 Papaw, 359 

 Papillionoideae, 467 

 Pappus, 487 

 Paraphyses, 331, 380 

 Parasites, artificial, 341 



fungal, 342 

 Parasitism, 325, 339 



facultative, 343 



obligate, 343 

 Parenchyma, 35 

 Parmelia perlata, 330 

 Parthenogenesis, 357 

 Pasteur, 89, 98, 307 

 Pea, 123 



edible, 468, 554 

 Peach, brown rot of, 293 



leaf-curl, 293 

 Psar blight, 309 



