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, 

 175, 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, 



Monoblepharis, 421 (Fig. 358). 

 Monocotyledons : Seed-Plants (Angio- 



sperms) having an embryo with 



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



2 9-3 2 ) > 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. 

 Monotropa, ectotrophic mycorhiza 



of, 195, 196 ; nucellus and embryo- 



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

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



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



346). 

 Moss-Plant, origin on protonema, 



356 (Fig. 298). 

 Mosses, 355, Chap. xxii. 

 Motility, 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 style, 257, 



269 (Fig. 214). 

 Mucor, 410, 412, 423 ; sporangia 



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



thallic 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). 



