596 



INDEX 



Mendel's law, 539; use in plant breed- 

 ing, 580; value, 547. 



Mendelian ratio and the combination 

 of gametes, 556. 



Mendelism, as demonstrated in Corn, 

 548*, 550*, 551*, 552*; as demon- 

 strated in Garden Pea, 541-546, 

 542*; as demonstrated in Wheat, 

 553. 



Meristem, 126, 204, 126*, 204*. 



Meristematic tissue, 126, 126*; of 

 buds, 204, 204*; of Grass stems, 

 213, 214*; of root tip, 143, 144*. 



Mesophyll, 244; described, 246, 250*. 



Mesophytic societies, 504; described, 

 506. 



Metabolism, 116, 274; anabolic and 

 catabolic, 274. 



Micro-organisms of the soil, 155. 



Micropyle, 39, 57, 38*, 57*. 



Microsphaera, 373. 



Microspore, 442, 441*; formation, 

 461,462*; mother cells, 461, 461*. 



Microsporangium, 442. 441*. 



Microsporophyll, 442, 441*. 



Microstrobilus, 446, 447*. 



Middle lamella, 277. 



Middlings, 65. 



Midrib, 245. 



Mildews, Downy, 355-360; Powdery, 

 373-375. 



Milkweed, 83, 133, 83*. 



Mistletoe, 164. 



Mixed buds, 207. . 



Moisture, given off in transpiration, 

 260, 260*; of the soil, 217; re- 

 quired for germination, 91. 



Molds, 155; Blue and Green, 375-377; 

 True, 360-363; Water, 353-360. 



Monadelphous stamens, 15. 



Monocotyledons, embryo, 466, 467*; 

 families, 495; origin, 471; seeds, 

 66; seedling, 102*, 103*, 104*, 

 105*; stems, 170; structure of 

 stems, 187-192. 



Monoecious, 14. 



Moonworts, 435, 434*, 435*. 



Morchella esculenta, 365, 365*, 366*. 



Morels, 364, 365*. 



Morning Glory, cotyledons, 111; 



plumule, 109; stem, 168, 175, 



177*. 



Morphine, 286. 

 Morphology, 2, 289. 

 Mosaic, of leaves, 241, 241*. 

 Mosses, 292, 405; described. 417-424. 

 Mucorales, 360-363. 

 Mullein, leaf, 266*. 

 Multiple fruits, 80, 80*. 

 Multiplication of cells, 123, 125*. 

 Muscarine, 286. 

 Musci, 405. 



Mushrooms, 352, 382, 384,385*, 386*. 

 Mustard, Black, 483, 483*; family, 



482. 

 Mutation, 520, 522*; in Evening 



Primrose, 524. 

 Mutation theory, 525. 

 Mutations, and evolution, 571; and 



selection, 579; in cereals, 579; 



in fruits, 579. 

 Mycelium, 352. 

 Mycorhiza, 155, 156*. 

 Myrsiphyllum, 169. 

 Myxobacteria, 350. 

 Myxomycetes, 336; described, 336- 



341; economic importance, 339. 



Naked Ascus Fungi, 364, 377, 376*. 



Naked buds, 205. 



Nasturtiums, 241*. 



Natural selection, 562; 565. 



Navicula viridis, 332*. 



Nectar, 133. 



Nectar glands, 133, 133*. 



Nectarine, 579. 



Nemalion, 326, 326*. 



Nereocystis, 319. 



Nerves, 245. 



Net-veined leaves, 245, 244*. 



Nicotine, 286. 



Nidularia, 392, 392*. 



Nightshade family, 491. 



Nitrogen, 133, 158. 



Nodes, 166. 



Nostoc, 209, 208*. 



