566 



BOTANY OF THE LIVING PLANT 



Membrane, permeable or semi- per- 

 meable, 25, 86. 



Mendel's Laws, 472. 



Mendelian segregation. 472 ; referable 

 to the development of the gametes, 



475- 



Meristele, of Ferns, 330 (Figs. 269, 

 270). 



Meristic differences, differences in the 

 fundamental number of parts in 

 different flowers, 231. 



Meristic variation, divergence in 

 certain cases in the number of 

 parts, where a definite number is 

 usual ; as in successive whorls of 

 leaves : 169, 526. 



Merulius, Dry Rot Fungus, 452. 



Mesocarpus, 400. 



Mesophyll, the parenchyma between 

 upper and lower epidermis of the 

 lamina, 62 (Fig. 45). 



Mesophytes, plants living under con- 

 ditions that are not extreme, 

 I75> 178 ; competition among, 

 179. 



Metabolism, chemical change within 

 the organism, 112 ; constructive, 

 in photo-synthesis, 98, 117 ; des- 

 tructive, 117. 



Metamorphosis, Goethe's theory of, 

 241. 



Metaxylem, the later-formed part of 

 the primary xylem, 73 (Fig. 55), 74 

 (Fig. 56). 



Miadesmia, seed-like organ of, 324. 



Microcycas, numerous motile male 

 gametes of, 324. 



Micropyle, a narrow channel leading 

 to the apex of the nucellus of an 

 ovule : the channel for the pollen- 

 tube, 258 (Fig. 206). 



Microspore, where spores are sexually 

 ' differentiated., the male spore, 

 characterised by its smaller size. 

 In Seed-Plants the pollen-grains 

 are microspores : 250 ; of Sela- 

 ginella, 319, 321 (Figs. 260, 264). 



Mildews, 430 (Figs. 363-365)- 



Mimosa pudica, sensitive plant, 129 

 (Fig. 91) ; movement under me- 

 chanical shock, 130 ; conveyance 

 of stimulus in, 131. 



Mistletoe (Viscum), parasitism of, 189. 



Mnium, conducting tissue of, 357. 



Molinia, mechanical construction of 

 stem, 153 (Fig. 113). 



Monkey-Puzzle (Araucaria), 303. 



Monkshood (Aconitum), pollination 

 of, 266; flower of, 511 (Figs. 415, 



417)- 



Monoblepharis, 421 (Fig. 358). 



Monocotyledons : Seed-Plants (Angio- 

 sperms) having an embryo with 

 one seed-leaf : stem of, 43 (Figs. 

 29-32) ; 56 ; stomata, 65 ; root of, 

 73 (Fig. 55) ; mechanical construc- 

 tion of stem, 153 ; of leaf, 155, 

 157 ; embryology of, 277 (Fig. 

 219) ; flowers of, 492, 493 (Ap- 

 pendix A.). 



Monopodial branching, where a new 

 branch arises laterally below the 

 apex of the original part, 317. 



jNIonotropa, ectotrophic mycorhiza 

 of, 195, 196 ; nucellus and embryo- 

 sac of, 261 (Fig. 209), 262. 



iNIorchella (Morel), 429 (Fig. 362), 

 437 (Fig. 370) ; asci of, 411 (Fig. 

 346). 



Moss-Plant, origin on protonema, 

 356 (Fig. 298). 



Mosses, 355, Chap. xxii. 



Motilit}' , of gametes, loss of, 463. 



Motor influences on movement of 

 water, 87. 



Moulds, 432. 



Movement, Chap. viii. 118, in grow- 

 ing parts, 123 ; in mature parts, 

 129 ; of water, slow and quick, 

 86 ; in tall trees, 88 ; of proto- 

 plasm within the cell, 22. 



Mucilage, in channel of stjie, 257, 

 269 (Fig. 214). 



Mucor, 410, 412, 423 ; sporangia 

 of, 424 (Figs. 359, 360) ; hetero- 

 thalhc culture of, 427 (Fig. 361) ; 

 zygospores of, 426, 410 (Fig. 345) ; 

 development of sporangium of, 



425- 

 Mucorini, reduction of sporangium 



to unicellular conidium, 455. 

 Mulberry, aggregate fruit of, with 



succulent persistent perianth of 



each flower, 294 (Fig. 243). 

 Multiplication, rapid, of Bacteria, 



459- 

 Mummy- wheat, 298. 

 Muscari (Grape-Hyacinth), 495. 

 Musci, 3 ; 353-364 ; saprophytism 



of, 358. 

 Mushroom, 441 ; 451 (Fig. 387) ; 



germination of, 453. 

 Mushroom " spawn," 452. 

 Mustard, 512 (Fig. 419)- 



