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 



Ophioglossales, 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 



Papaveraceae, 442 



Papillae of stigma, 389, 392 



Papilionaceae, 452 



Papilionaceous flower, 453 



Pappus, 483, 486 



Paraphyses, 208, 209, 230, 231, 262, 



263, 303 



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

 Parenchyma, II, 77, 81 

 Parmelia, 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 

 Penicillium, 217, 228, 242 

 Perennials, 69 

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



383 



Periderm, 266, 267, 268 

 Perigynous, 385, 386 

 Perisperm, 397 

 Perisporiales, 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 



