INDEX 



805 



Madder family, 714 



Magnesium, 177, 328 



Magnolia, 693 



Maltase, 133, 175 



Maltose, 133, 175 



Manganese, 328 



Mangrove, 298; seedlings, 389 



Maple, 756; family, 711; flowers and 

 fruits, 712; leaf, 77, 216; sap, 324 



Marchantia, 652, 653 



Marl, 593 



Marshes, 597, 760 



Marsh-marigold, 746 



Marsilia, 667 



Mass movement, 197 



Media, 518, 589 



Megasporangium, 374 



Megaspore, 374; mother cell, 374 



Megasporocyte, 374 



Megasporophylls, 379, 684 



Meiosis, 448 



Membranes, artificial, 203; differentially 

 permeable, 202, 204; plant, 205 



Mendel, 435, 459 



Mendelian principles, 461; ratios, 458 



Meristems, 68, 69, 278 



Mermaid weed, 81, 82 



Mesophyll, 71, 72. 81, 120; palisade, 70, 

 71; spongy, 70, 71 



Mesozoic era, 723; floras, 730 



Mesquite, 772 



Metaphase, 446 



Microcosms, 180, 181 



Micropyle, 374, 684 



Microsporangium, 372 



Microspore, 372; mother cell, 372 



Microsporocyte, 336, 372 



Microsporophylls, 379 



Middle lamella, 170 



Midrib, 19 



Mildews, downy, 550, 552, 557; pow- 

 dery, 549, 558 



Millardet, 578 



Milo, 696 



Mineral deficiency. 101 



Mint family, 714; flowers, 716; oils, 173 



Miocene period, 723 



Mistletoe, 508. 509, 706; family, 705 



Mitosis, 447 



Molds, 3, 4, 720; blue, 547; bread, 543; 

 green, 547; slime, 562; snow, 543; 

 water, 546, 548 



Molecular motion, 199, 212 



Molecules, 61, 95, 139, 142, 156; of 

 chlorophyll a, 125; of sugars, 104, 135 



Monocots, 368 



Monoecious, 360 



Monoploid, 451, 636 



Monotropaceae, 713 



Monterey cypress, 780 



Moonseed vine, stem of, 266, 286 



Morel, 542, 553 



Morning-glory family, 714; plants, 342 



Mosiac, 81, 215, 216; disease, 585 



Mosses, 5, 7, 564, 640, 641-651; and 

 chromosomes, 649; bog, 650; classes of, 

 649; club, 668-673; fern, 640; haircap. 

 643, 644; luminous, 642; peat, 649, 

 650; reindeer, 565; reproduction of, 

 646; rock, 650; true. 649 



Movement, mass, 197; molecular, 199, 

 223; of plant parts, 209, 213, 216 



Mucilages, 169, 172 



Musaceae, 699 



Musci, 645 



Mushrooms, 4, 7. 542, 543, 555 



Muskeg, 638, 745 



Mustard family. 706 



Mutations, 474-488; and environment. 

 481; in Boston fern, 436, 484; in 

 cosmos, 492; in hibiscus, 435; in 

 Piiccinia, 572; in radish-cabbage, 482; 

 in reduction division, 479: in sun- 

 flower, 494; in sweet potato, 435; in 

 trilliuni. 493; in vegetative cells, 475; 

 in wheat, 481 



Mycelium, 543, 573 



Mycorhizal fungi. 510 



Myxophyceae, 608, 621-624 



Names, common. 18, 25; plant, 18, 24; 



scientific, 18, 25 

 Natural selection, 500 

 A^avicula, 97 

 Needle grass, 766 

 Ne^nalion, 634, 635. 636 

 Nematodes, 583 

 Nereocystis, 601, 629 

 Neutrons, 96 

 Nitrates, 45, 143, 192, 533 



