480 



MORPHOLOGY OF THE ANGIOSPERMS 



Aquatic plants, anther wall, 136, 141 



dehiscence, 167 



embryo development, 319 



filament absent, 112 



perianth reduction, 438 



pollen, 158 



pollination, 172 



reduction, 412, 438, 439 



stamens, solitary, 104 



transmitting tissue, 202 



vessel elements, 431, 439 



vesselless, 45 

 Aquilegia, androecium, polystemonous, 

 100 



anther-sac wall layer, 168 



carpel, anatomy, 93 



flower, arrangement of organs, 87 



nectaries, 152 



petals, 148 



stamens, arrangement, 97 



syncarpy, 231 

 Araceae, anther dehiscence, 169 



cotyledon, 329, 360 



embryo, adventive, 346 

 anatomy, 347, 350 

 development, 319 



endosperm, 374 



entomophily, 173 



leaf, compound, 18 



ovule, 266 



pollination by snails, 172 



venation, 462 

 Arachis, carpel number, 221 

 Araliaceae, ligules, 15 



node, 25 



ovules, 266 

 Araucaria, ovule at pollination, 272 



pollen geniiination, 178, 189 



seed, 1 

 Araucariaceae, embryo, 313 



male gametophyte, 309 



pollen tube, 387 

 Arceuthohium, embryo sac, 280 



flower, 277, 280 



microsporangia, 1 14 



placenta, 280 

 Archesporial cells, 262, 264, 271, 281, 

 402, 436, 438 



multiple, 416 

 Archesporial tissue, 279 

 Archesporium, multicellular, 291, 431 



ontogeny, 138, 166, 279, 290, 291 



parietal cells, 290, 291 



parietal tissue, 290-291 



sporogenous cells, 290-291 



Archichlamydeae, nodal structure, 25 



root, 23 



stipulate and estipulate genera, 12 

 Areca, flowers, 447 

 Argemone, placentation, 210 

 Aril, 256, 258, 373, 432 

 Arilloids, 373 

 Arisaema, cotyledon, 360 



microsporangia, 1 14 



venation, 18 

 Aristolochia, dehiscence, 167 



megaspore, 292 



placentation, 210 

 Aristolochiaceae, anther dehiscence, 128 

 Arjona, ovule, 278 



placenta, 278 

 Aroids (see Araceae) 

 Aronia, hypanthium, 249 

 Artabotrt/s, transmitting tissue, 196 

 Artemisia, anemophily, 173 



pollen, 163 



stelar type, 59 

 Articulation, 77 



Artocarpus, ventral stipules, 12 

 Arum, cotyledon modification, 343 



embryo, 339, 358 



seedling, 339, 365 

 Asariim, dehiscence, 167 

 Ascarirm, double midveins in leaf, 28 

 Asclepiadaceae, anther dehiscence, 169 



megaspore mother cells, 292 



ovule, 263, 278 



phloem, internal, 58 



pollinia, 159 



stamen, 113 



stele, amphiphloic, 23 



syncarpy, 231, 243 

 Asclepias, inflorescence, 69 



nodal structure, 26 



ovule, 263, 275 

 Ascijron, stamen arrangement, 98 

 Asimina, flower, anatomy, 393 



perianth, 424 



stamens, 393 



vascular system, cortical, 406 



wood, 393 

 Asphodelus, embryo, 338 



seedling, 338 

 Aster, stele, 24 

 Atropous (see Orthotropous ) 

 Attalea, ovule, 448 

 Australian flora. Cretaceous, 468 



microflory, 83 

 Attstrobailetja ( see Austrobaileyaceae ) 

 Austrobaileyaceae, appendages, phyllo- 

 taxy, 408 



cambium, 408 



