INDEX 



501 



Narcissus, 419 



Nectar glands, 381, 388, 404, 430, 



431.437. 439.440,457, 458 

 Nemalion, 213 

 Nereocystis, 205 

 Netted veined leaf, 426, 427 

 Nettle, 40, 434 

 Nidularialcs, 267 

 Nitrate, 66, 160 

 Nitrite, 160 

 Nitrogen, 16, 65, 160 

 Nostoc, 166, 292 

 Nucleoli, 56, 57 

 Nucleus, I, 2, 56 

 Nut, 432, 433 

 Nutations, 103, 104, 106 



Oak, 31, 383, 427, 434 



Odors, 412, 417, 433 



Oedogonium, 197, 198 



Oenothera, 29, 463, 464 



Olive, 154 



Onoclea, 330 



Oogonium, 197, 208 



Oosphere, 197, 275 



Operculum, 299, 300, 305, 306 



Ophioglossalcs, 313 



Ophioglossum, 313, 315 



Orange, 460 



Orchid order, 64, 421 



Orchidales, 421, 423 



Orchis, 425 



Order, 147 



Oscillatoria, 166, 167 



Osmosis, 53 



Osmunda, 326, 328 



Ovary, 116, 117, 380 



Ovule, 116, 117, 118, 380, 388, 389, 



399 

 Oxygen, 3, 13, 15, 21, 22, 75, 121 



Palisade mesophyll, 9, 10, 21, 40, 41 



Pallavicinia, 288 



Palms, 405 



Palmelloid state, 192 



Pandanales, 401 



Pandorina, 179 



Papaverales, 442 



Papavcraceae, 442 



Papillae of stigma, 389, 392 



Papilionaceae, 452 



Papilionaceous flower, 453 



Pappus, 483, 486 



Paraphyscs, 208, 209, 230, 231, 262 

 263, 303 



Parasites, 64, 68, 216, 244, 245, 350 



Parenchyma, 11, 77, 81 



Parmclia, 233 



Parnassia, 448 



Pasteur, 164 



Pea, family, 452 

 sweet, 453 



Peach curl, 248 



Pear, branch of, 73 



Peat, 298 



moss, 296 



Pedicel, 403 



Pediastrum, 184 



Peniclllium, 217, 228, 242 



Perennials, 69 



Perianth, 115, 116, 286, 287, 288, 379, 



383 

 Periderm, 266, 267, 268 

 Perigynous, 385, 386 

 Perisperm, 397 

 Perisporialcs, 244 

 Peristome, 294, 305, 306, 307 

 Perithecia, 229 

 Peronospora, 220, 223 

 Peronosporales, 220 

 Personata flower, 478 

 Petals, 115, 116, 384 

 Petiole, 7, 8, 29, 42, 43, 107, 426 



427 

 Peziza, 231 

 Pezizales, 229 

 Phaeophyceae, 201 

 Phallales, 268 

 Phallus, 268 

 Phegopteris, 330 

 Philotria, 2 



Phloem, 59, 79, 91, 314-315 

 Phosphorescence, 259 

 Phlox order, 474 

 Phosphorus, 16 

 Photosynthesis, 11-16, 23 



