INDEX 



Pages containing illustrations are indicated by italic figures. 



Abies, strobilus 2jp, 246 



Abietineae 220; archegonium 267; dis- 

 tribution 301; history 303; proembryo 

 288, z8g, 2go; prothallial tissue 277 



Adiantum, amphiphloic siphonostele 6; 

 leaf gap 10 



Agathis, microsporangium 240; shoot 

 236; strobilus 240, 324 



Amphiphloic siphonostele s; Adiantum 6 



Amyelon iji 



Aneimites 24; seed 39, 40 



Angiocycads 74 



Antholithus 193 



Anthostrobilus 74 



Araucaria, embryo 297, 2g8; habit 22$; 

 ovuliferous bract 248; prothallial 

 tissue 2y8; strobilus 240, 24^, 324 



Araucarineae 221; archegonium 271; 

 distribution 302; history 305; pro- 

 thallial tissue 277, ^78 



Araucariopitys 306, 308 



Archegonium, Abietineae 267; Arauca- 

 rineae 271; Cordai tales J7p; Cupres- 

 sineae 269; Cycadales 133, 13s, 136, 

 I37> ^3^! evolutionary tendencies 

 420; Ginkgoales 205, 208, 211; 

 Gnetales 385, 386; Pinaceae 263, 

 264, 266, 267; Taxaceae 330; Taxo- 

 dineae 268 



B 



Baiera, leaf i8g 



Bars of Sanio, Pinaceae 235 



Bennettitales 65; distribution 85; em- 

 bryo 67; history 85; leaf 71; male 

 gametophyte 82; megasporangium 78; 

 microsporangium 75; relationship 86; 

 strobilus 72, 73, 76, 7g, 80, 81, 82; 

 vascular anatomy 70; vegetative or- 

 gans 66 



Bennettites, seed 83, 84; strobilus 7q 

 Blepharoplast 142 

 Botryopterideae 54 

 Botryopteris 54 

 Brachyoxylon 306, 308 

 Brachyphyllum 308 



Calamopitys 20 



Calymmatotheca 27 



Cephalotaxus, embryo 2gg; male cell 

 339> pollination drops 27s 



Ceratozamia, embryo ijj; megaspore 

 127; megasporophyll 124, 131; vas- 

 cular plate gg, 100, loi, 103 



Chromosomes, Gnetales 384; Pinaiceae 

 259; Taxaceae 329 



Cladosiphonic siphonostele 9 



Cladoxylon 20 



Codonotheca 28, 2g 



Colpoxylon 20 



Coniferales 220; archegonium 263, 264, 

 270, 330; chromosomes 259, 329; dis- 

 tribution 301, 349; embryo 287, 288, 

 28g, 2go, 2gi, 2g2, 2g3, 2g4, 295, 2g6, 

 2g7, 2gS, 2gg, 346, 347, 349; female 

 gametophyte 259, 260, 261, 329, 330, 

 337; fertilization 284, 286, 287, 344, 

 34S; history 303, 349; interrelation- 

 ship of tribes 308; juvenile leaves 227; 

 leaf 23s, 236, 237, 317, 318; list of 

 genera 353; male gametophyte 272, 

 273, 276, 33S, 336, 337, 339, 340, 342; 

 megasporangium 244, 254, 255, 256, 

 321, 327; megaspore 257, 258; mega- 

 spore membrane 271 ; microsporangium 

 23g, 240, 241, 243, 272, 319; micro- 

 spore 274; microsporophyll 23g, 240; 

 relationship 309, 350; seed 300; 

 seedling 231; stamen 319; strobilus 

 238, 23g, 240, 244, 246, 247, 319, 320, 



461 



