632 
INDEX 
Marsh grass, 293 
Mary, typhoid, 310 
Matonia pectinata, 157 
Medullary rays, 65 
Megasporangia, 385 
Megaspores, 385 
Megasporophylls, 385 
Melilotus lutea, 82 
Melons, wilt of, 309 
Membrane, limiting, 17 
nuclear, 186 
Memory, physiological, 192 
Mendel, Gregor, 549 
Mendelism, 549 
Meristem, 374 
Mesophyll, 31 
Metabolism, 90 
Metachlamydeae, 456, 473 
Metamorphism, 582 
Micorhiza, ectotrophic, 336 
endotrophic, 337, 339 
Microcycas, 411 
Microsporangia, 385 
Microspores, 385 
Mid-vein, 37 
Migration of plant diseases, 312 
Migrations, plant, 586 
Mildew, downy, 292, 313 
powdery, 292, 295 
Milk, souring of, 316 
"certified," 316 
Milkweed, 475, 476, 477, 478 
Mimosa, 468 
pudica, 122 
Mimosoideae, 468 
Mitosis, 184 
Mohl, Hugo von, 15 
Molds, 304 
sexuality in, 355 
sooty, 295 
Monocotyledons, 489 
and dicotyledons, 453 
Monocotyledons origin of, 571, 608 
types of, 491 
Monotropa, 473 
Hypopitys, 324 
uniflora, 323, 476 
Monotropaceae, 473 
Moon worts, 175 
Morchella esculenta, 289 
Morphology, 4, 147 
Mosses, true, 193, 204 
Motherwort, 145 
Mountain laurel, 474 
palm, 134 
Mucor mucedo, 304 
Mullein, 31, 130 
Multiplication, vegetative, 163, 
i?9, 346, 3Si 
Musa sapientum, 26 
Musci, 193 
Mushrooms, 288 
Mustard, white, 50, 133 
Mutation theory to Darwinism, 
relation of, 537 
test of, 535 
value of, 537 
Mutations, 530, 546 
Mutualism, 325, 328 
Muricaceae, 83 
Myrmecophytes, 327 
Myxomycetes, 284, 285, 323 
N 
Nasturtium, 137 
garden, 143 
Nazia racemosa, 495 
Neck, 169 
Neck-canal, 170 
Neck-canal-cell, 170 
Nephrolepis, 163, 528 
New Zealand raspberry, 28 
Nicotiana Tabacum, 480, 545 
Nightshade, 481 
