500 



MORPHOLOGY OF THE ANGIOSPERMS 



Megagametogenesis, 297 

 "Megarrhiza," root system, 320 

 Megasporangium, microsporangium 

 homologous with, 284 

 ovule, 284 

 position, 186 

 ranalian, 431 

 Megaspore mother cell, 261, 262, 264, 



290, 292, 293, 297 

 Megaspores, mature, 262, 264, 281, 291, 

 292 297 

 tetrad,' 261, 262, 281, 290, 293 

 vestigial, 304 

 Megasporogenesis, 262, 281, 291, 292, 



293, 297 

 Megasporophyll, 90 



bennettitalian unlike angiosperm, 465 

 (See also Carpels) 

 Meiosis, in megaspore, 281, 292 



in microspore, 144 

 Melaleuca, fruit dehiscence, 378 



inflorescence, 68 

 Melanthioideae, Butomus and Schetwh- 

 zerm resemblances to, 441 

 carpel evolution, 441 

 gynoecia, 441 

 ovule-trace origin, 442 

 placentation, 441, 442 

 Melanthiiim, stipules on perianth, 12 

 Melastomaceae, anthers, 110 

 dehiscence in, 165 

 stamen, 113, 133, 134 

 vascular system, 406 

 MeHaceae, node, 25 

 seed, 371 

 xylem, 54 

 Melodora, stamen, 392 

 Menispermaceae, anthers, 128 

 Menyanthcs, placentoids, 143 

 Mercurialis, anemophily, 173 

 Meristems, apical, 4, 30-35, 442 

 in root, 36 



surface, central and peripheral, 31 

 tunica corpus, 5 

 basal, 30, 37 

 flank meristem, 33 

 intercalary, 11, 30, 37, 39, 338 

 intemodal, 30 

 marginal, 37, 38, 135, 228 

 petiolar, 38 

 rib, 32, 33 

 secondary, 22 

 stipular, 37 

 {See also Cambium) 

 Mesocotyl, anatomy, 348, 352, 353 

 description, 323, 331, 335, 336, 341, 

 342, 356 



Mesogamy {see Chalazogamy) 

 Mesozoic period, 465 

 Metachlamydeae, leaf-trace number, 25 

 node, 25 



root, 23 

 Metroxylon, loricate fruit, 75 

 Michelia, carpel, 391 



characters, primitive, 391 



flowers, solitary, 389 



gynoecium, 390 



inflorescence, 389, 391 



microsporangia, 125, 389 



ovule, number, 390 

 traces, 272 



placentation, 216 



stamen, 109, 111, 390 



stamen-trace number, 133, 309, 393 

 Microflory in Australian flora, 83 

 Micropyle, 200, 256, 257, 268, 282, 295, 



372, 433 

 Microsporangium, development, 166 



form, 115 



interpretation, 116, 117 



number, 114 



ontogeny, 129, 130 



position, 104, 115-117, 118, 119, 120, 

 121, 122-125 



ranalian, 385, 388, 389, 391, 392, 

 394, 399, 400, 401, 402, 412, 

 417, 419, 425, 431 



Umbellularia, 99 



wall-less, 126, 127 

 Microspore, development, 166, 174 



formation, 144, 145 



germination, 158, 174 



mature, 159, 164, 174, 175 



wall, 145, 146 

 Microsporogenesis, 137-139, 159, 176 

 Microsporophyll, bennettitalian unlike 

 angiosperm, 465 



definition, 90 



evolutionary changes, 119 



phylogeny, 140 



ranalian, 425 



{See also Stamen) 

 Mimoseae, placentoids, 143 



pollen, 161 

 MitcheUa, inflorescence, 81, 82 

 Momordica, ovule, 268 

 Moneses, inflorescence, 72 

 Monimiaceae, androecium, 96, 106 



anthers, 124 

 dehiscence, 411 



embryo anatomy, 350 



ethereal oil cells, 430 



flower, 410 



hypanthium, 411 



