INDEX. 



5C9 



l\Tutation, 338 

 Mutualism, 95 

 Rrycelium, 6, 86-90 

 Mycetozoa, 213, 214 

 Mycorhiza, 86, 91, 92, 217 

 Myosotis, 500 

 Myrica cerifera, 494 

 Myrica gale, 494 

 Myricales, 494 

 Myriophyllum, 403 

 Myrtales, 49S 

 Myxobacteriales, 165 

 Myxomycctes, 83, 213, 214 



Naiadacea', 492 



Naiadales, 492 



Naias, 492 



NemaUon, 171, 172, 175 



Nemalionales, 175 



Nettle, 495 



Nicotiana, 501 



Nidulariales, 220 



Nitella, 8, 9, 176 



Nitrobacter, 83 



Nitrogen, 92, 93 



Nitromonas, 83 



Nostocaceic, 164 



Nucellus, 304 



Nucleus, 3, 4; morphology of, 340- 



345 

 Nuphar advena, 496 

 Nutation, 123, 124 

 Nympha;a odorata, 496 



Oak, 495 

 Oak family, 495 

 (Edogoniacese, 162 

 CEdogonium, 147-151, 350 

 Oenothera biennis, 49S 

 CEnothera gigas, 338 

 CEnothera laraarkiana, 33S 

 Olpidium, 214, 215 

 Onagar biennis, 49S 

 Onagraceas, 498 



Onoclea sensibilis, 254, 273-27S 

 Oogonium, 144, 150, 15s 

 Oomyeetes, 214, 215 

 Ophioglossales, 295 

 Ophioglossum, 295 

 Opuntiales, 49S 

 Orchidace;e, 494 

 Orchidales, 494 

 Orchids, 442 

 Oscillatoriacca;, 163 



Osmosis, 13-20 

 r)smundacea;, 295 

 Ostrich fern, 279 

 Ovule, 302, 321, 334, 421 

 Oxalis, 497 

 Oxycoccus, 500 

 Oxydendrum arboreum, 501 

 Oxj'gen, 63, 1 10-113 



Pahsade cells, 41, 43 

 PalmaceiE, 493 

 Palmales, 493 

 Palms, 408 

 Pandanales, 492 

 Pandanus, 492 

 Pandorina, 160, 350 

 Panicle, 427 

 Papaverales, 496 

 PapilionacejE, 423, 497 

 Parasites, S3, 84, 86 

 Parasitic fungi, nutrition of, S6-90 

 Parenchyma, 50, 356, 363 

 Parietales, 498 

 Parkeriacea:, 296 

 Parmelia, 96 

 Parthenogenesis, 1S4 

 Partridge berry, 501 

 Pea, 497 

 Pea famil)', 497 

 Pear, 456 

 Pediastrum, 161 

 PelHa, 164 

 Pellonia, 405 

 Pcltigcra, 94, 95 

 Pepo, 456 

 Pericycle, 360 

 Peridinese, 166 

 Perig)'nous, 425 

 Perisperm, 331, 332 

 Perisporiales, 217 

 Peronospora, 183, 215 

 Peronosporales, 215 

 Persimmon, 500 

 Pezizales, 217 

 Phacidiales, 217 

 Phreophycea^, 167 

 Pha;osporales, 171 

 Phallales, 219 



Phloem, 50-52, 360, 361, 363 

 Phlox family, 500 

 Phoradendron flavescens, 495 

 Photosynthesis, 67, 68, 70, 117 

 Phycomycetes (Phy"co-my-ce'tes); 

 214, 215 



