634 



Microorganisms, 33, 367 



Mildews, 62 



Millspaugh, C. F., 223, 225 



Miranda, F., 222 



Molds, 33, 50, 62, 570 



Monheim, F., 236 



Monographs and floras of higher plants, 



205 

 Moore, D. M., 218 

 Moore, John A., 218 

 Morgan, J. P., 10 

 Morphogenesis, 118 



cell shape, 120 



cell size, 120 



differentiation, 122 



experimental manipulation of environ- 

 ment, 124 



organization, 127 



regeneration, 122, 123 



regulators, 128 



tissue cultures, 124 

 Morphology of plants, 606 



comparative, 582, 606 

 Moscoso, R. N., 227 

 Moure, Padre J., 315 

 Muller, Ernest H., 212 

 Munz, P. A., 21fy 

 Murga Pires, J., 261-328 

 Mycology, medical, 577 

 Mycorrhiza of forest trees, 371 



Nash, G. v., 225 



Natural history, 247 



Natural resources, conservation of, 359, 

 360 



Nelson, Aven, 218, 360 



Nelson, Ruth Ashton, 218 



Neomycin, 46 



New World, botanical exploration of, 

 209-246 

 boreal America, 210 

 temperate North America, 216 

 tropical America, 221 



Newcombe, T. C, 9-11 



Nitrogen, atmospheric, fixation by bac- 

 teria, 33, 371 



Nomenclature, botanical, American 

 Code of, 203 



Norman, A. G., 367-379 



INDEX 



Nucleic acid, structure of, 141 

 Nutrition of plants, 367, 431, 624 



and fertilizers, 431 

 Nystatin, 47 



Oak wilt, 50 



Oliveira Castro, Gustavus M. de, 261- 

 328 



Organic acids production by fermenta- 

 tion, 34 



Overton, James B., 625 



Ownbey, Marion, 219, 243 



Paleobotany, 585, 590 



Palmer, E., 222 



Palynology, 595 



Papenfuss, George F., 554-569 



Paper, 509 



Paper pulp, 509 



Paper-pulp industry in United States, 



508 

 Papyrus, 509 

 Parry, C. C, 216 

 Pease, A. S., 215 



Peattie, Donald Culross, 456-466, 499 

 Peck, M. E., 220 

 Pectin-hydrolyzing enzyme production 



by fermentation, 41 

 Penicillin, 34, 35, 43, 446 



production by fermentation, 41-44 

 Pennell, Francis W., 233-236, 241 

 Perez-Arbelaez, E., 232, 233 

 Petersen, E., 236 

 Peyote, 452 



Pharmaceutical science, 444 

 Pharmacognosy, 444 

 Phelps, Kathleen D., 245 

 Phelps, William H., Jr., 245 

 Phloem, 95 



Photoperiod and blossom induction, 429 

 Photoperiodism, 626 

 Photosynthesis, 62, 627 

 Phylogeny of plants, 585 

 Physiology, of plants, 615 



of seeds, 624 

 Phytosociology techniques applied to 



Brazilian rain forest, 261 

 Pinchot, Gilford, 359 



