Subject Index 



545 



Meristems, intercalary, 79 



lateral, 79-88 



residual, 67 



rib, 47 



zonation in, 64 

 Mespilus, 268 



Metabolic gradient, 73, 140 

 Metaplasin, 396 

 Metaxenia, 101, 407 

 Metzgeria, 234 

 Microcycas, 64 

 Microfibrils in cell wall, 165 

 Middle piece, effect in grafts, 260 

 Mimosa, 345, 346 

 Mitogenetic rays, 40 

 Mitosis, 25 

 Mnium, 170 

 Monstera, 191, 218 

 Morphogenesis, defined, 3 



early work in, 5-6 



in lower plants, 6 



phenomena in plants, 7 

 Morphogenetic factors, 7, 303 

 Morphogenetic movements, 5 

 Morphogenetic norms, 449 

 Morphogenetic point of view, 8 

 Morphogenetic problems, 5 

 Morphology, 1 



idealistic, 1, 114 

 Mucor, 221, 400 

 Muehlenbeckia, 169 

 Multipotent primordia, 189 

 Myxamoeba, 23, 223 

 Myxobacteriaceae, 228 



Narcissus, 65 



Neurospora, 373 



Nicotiana, 156, 261, 264, 282, 295, 296, 



343, 419, 426 

 Nitella, 41, 149, 166 

 Nitrogen, effects, in development, 364 



in slime molds, 366 

 and sex differences, 365 

 Normal curve, 16 

 Norms, morphogenetic, 449 

 Nothoscordum, 107 

 Nucellar embryos, 206 

 Nuclear size in relation to cell size, 27 

 Nucleic acids, 3 

 Nucleoplasmic ratio, 27 

 Nuphar, 71 

 Nymphaea, 71 



Oenanthe, 332 



Oenothera, 35, 321, 438 



Onoclea, 137 



Ontogeny, differentiation during, 205 



Ophiostoma, 54 



Opuntia, 169 



Organ-forming substances, 376, 391, 413, 



' 458 

 Organism, 2, 23 



as fundamental biological fact, 459 

 Organismal theory, 23 

 Organization, 449-459 



components, 449 



as expression of molecular forces, 456 



gradients, 450 



mathematical relations, 456 



not lost in abnormal growth, 453 



polarity in, 449 



regulatory mechanisms, 452 



spirality in, 450 



symmetry in, 450 

 Organizer, 156 



Oriented behavior in polarity, 144 

 Orobanche, 397 



Orthostichies in phyllotaxy, 153 

 Osmotic concentration, of cell sap, 40 



and cell size, 40, 335 



and plant form in algae, 336 



and polyploidy, 335 

 Osmunda, 71, 188 



Parabolic curves in meristem, 63 

 Paramorphs in fungi, 373 

 Parastichies, contact, 155 



in phyllotaxy, 154 

 Parthenocarpy, 378 

 Pattern, cytoplasmic, 456 



macromolecular, 455 

 Pediastrum, 179, 390 

 Pedicularis, 445 

 Pelargonium, 269 

 Pellionia, 173 

 Pelory, 176, 282 

 Pemphigus, 284 

 Periblem, 60 

 Petunia, 264, 265 

 Phalaris, 190, 222 

 Pharbitis, 282, 419 

 Phascum, 234 

 Phaseolus, 250, 274, 282 

 Phasic development, 205 



and sex, 428 

 Phellem, 87 

 Phelloderm, 87 

 Phellogen, 87 



origin in old tissue, 88, 201 

 Philodendron, 218 

 Phleum, 131 



Phloem fibers, growth, 82 

 Phlox, 282, 315 



Phosphorus, role in development, 368 

 Photoperiod, 315 



