364 



INTRODUCTION TO BOTANY 



Mildews, *238-242, 244 



Milk supply, 209 



Milkweed, pollination of, *148-150 



Mississippi River, delta of, 27 



Mississippi River, silt carried by, 27 



Mistletoe, 31*, 52* 



Mixed buds, 95, 99* 



Molds, *235-239 



Monocotyledonous stems, 68 



Monocotyledonous stems, growth of, 



in thickness, 68 

 Monocotyledons, 158, 302, 306 

 Monotropa, 50*, 51* 

 Morchella, 243*, 244, 261 

 Morel, 243*, 244 

 Morphology, 197 

 Mosaics, leaf, 74 

 Moss, life history of, *262-266 



Mucor, 236* 



Muehlenbeckia, 57* 



Musci, 281 



Mushroom, 234*, 243*, *256-261 



Mustard seedling, root hairs of, 10* 



Mutations, 173 



Mycelium, 236 



NSiked buds, 94 

 Nectar, 138 

 Nectar glands, 138* 

 Netted veining, 70 

 Nilsson, Hjalmar, 180 

 Nitrification, *204-207 

 Nitrogen, 39 



Nitrogen-fixing bacteria, 39 

 Nocturnal position, 77 

 Nostoc, *219-221, 260 

 Nucellus, 136* 

 Nucleus, 21*, 136*, 224* 

 Nutrition of plants, *34-55 

 Nuts, 156 



Oak leaves and acorns, 195* 



Oak trees, 8* 



Oak wood, 65*, 109 



Oat smut, 252*, 253 



Odors of flowers, 151 



Onoclea, 277* 



Oogonium, 228* 



Oospore, 228* 



Open bundles, 69 



Opposite branches, 97* 



Opposite leaves, 71*, 72 



Order, 196 



Oscillatoria, 219, 221*, 260 



Osmosis, 41 

 Ovary, 130, 131*, 300 

 Ovule, 16, 17, 130, 131*, 136* 

 Ovule, structure of, 136* 

 Oxygen, 39, 343, 344 



Palisade cells, 36* 

 Parallel veining, 70* 

 Parasites, 49, *51-53, 234 

 Parasitic bacteria, 210-215 

 Parasitic roots, 31* 

 Parasitism, 49, *234-261 

 Parmelia, 248*, 261 

 Parsnip, wild and cultivated, 176 

 Parts of a plant, 6, 7* 

 Pasteur, Louis, 217, 218* 

 Pathology, 197 

 Pea seedling, mutilated, 1 65 

 Peach, 318* 



Peach flower prepared for hybridi- 

 zation, 189* 

 Peach rot, 242* 

 Peaches, 318* 



Pear, bud development, 99*, 100 

 Pear blight, 210-212 

 Peat bogs, 267 

 Pelargonium, desert, 29* 

 Penicillium, 245*, 261 

 Perennial, 12, 44, 45* 

 Perianth, 128 

 Perigynous flower, 131* 

 Perisperm, 158 

 Periwinkle, flower of, 145* 

 Petal, 14*, 125*, 126* 

 Petiole, 13, 69* 

 Phseophycefe, 260 

 Phanerogams, 299 

 Phloem. See Bast 

 Photosynthesis, 38 

 Phycomycetes, 235, 261 

 Phylloxera, 330, 331 

 Physiology, 197 

 Phytopathology, 197 

 Pine needle, 283, 284*, 285* 

 Pine seed, 292* 



Pine stem, growth of, 60, 61, 288 

 Pine wood, section, 109* 

 Pinus, *283-292 



Pistil, 15, *125-127, 130, 131*, 300 

 Pistillate flower, 127* 

 Pitcher plants, 54 

 Pith, 11 

 Placenta, 131* 

 Plant breeding, *1 73-191 

 Plant cell, *20"-23 



