356 



Index 



Mycelium, 75 

 Myrmecophily, 221, 222 



Narcissus, 166, 176, 337; N. 



incomparabilis, 337 ; N. 



jonquilla, 337; N. odorus, 



337 ; N. pseudo-narcissus, 



337 



Nasturtium, 230, *23i 

 Natural selection, 46, 312, 



313, 347 

 Nectarine, 308 

 Nemophila, 275 

 Neo-Darwinism, 312 

 Neo-Lamarckism, 312 

 Nepenthes, 219 

 Nereocystis, 59, 60 

 New Zealand flax (Phormi- 



um), 278 

 Nigritella, N. angustifolia, 



337; N. suaveolens, 337 

 Nitrogen, 71 



Nitrogen-bacteria, 5, 6, 212 

 Nocturnal flowers, 229 

 Norfolk Island pine (Arau- 



caria), 140 

 North Temperate Zone, flora 



of, 250 

 Nostoc, 218 

 Nucleus, 9 

 Nuphar, 40 



Nutrition of green plants, 12 

 Nutrition of Fungi, 77 

 Nyssa, 261 



Oak (see also "Quercus"), 

 171, 172, 226, 242, 246, 251, 

 252, 254, 268, 270, 274, 292, 

 338 



CEdogonium, *56, *66 



OEnothera, 321, 323 ; CE. bien- 

 tiis, 323; CE. grandiflora, 

 323; CE. Lamarckiana, 321, 

 3p3 



Onion mildew, 212 



Ontogeny, 24 



Ontogenetic variations, 24, 32, 

 316; transmission of, 316 



Ophioglossum, *iO2, 103, 114, 



US 



Opium, 282 

 Orange, 288 



Origin of land plants, 80 

 Origin of species, 301, 311 

 Orchids, 79, 167, 168, 176, 



227, 228, 231, 245, 247, 293, 



340; hybrid, 340 

 Orchis, 232; O. spectabilis, 



*232 



Ornithophily, ornithophilous 



flowers, 234, 235, 309 

 Orthocarpus, 275 

 Orthogenesis, 308 

 Ovum (see "Egg") 

 Ovule, 123, 136, 152 



Pacific slope, flora of, 



272 

 Paleozoic, flora of, 105, no, 



145, 237, 238 

 Palms, 152, 164, 165, 245, 249, 



269, 270, 272 



Pandanus (see " Screw- 

 pine") 

 Pangenes, 10, 21, 321, 322, 



324, 325 

 Parasites, 71, 72, 211, 212, 



215, 217 



Parthenogenesis, 46, 224 

 Partridge-berry (MitchellaV 



230 



Passion-flower, 270 

 Paw-paw (Asimina), 269 

 Pea-family, 175 

 Peach, 297 

 Pear, 297, 317 

 Pecan, 298 

 Pelargonium, *23i 

 Penicillium, 39 

 Pentstemon, 177 

 Pepperidge (Nyssa), 261 

 Pepper family, 150, 161, 163, 



245 



Peperomia, 153 

 Peridineae, 62 

 Permian, flora of, 133, 239 



