INDEX 



455 



Embr\on;il lubes, Pinaicac :;95, 2i)6, 



297 

 Encephalarlos, archegonium 7 J5; mega- 



sporophyll 124, 131 

 Endarch 10, // 



Endosperm, see female gametophyte 

 Ephedra, archegonium j6'd; embryo jp^, 



395, 397; female gametophyte 377, 



384; fertilization 392; habit 364; 



male gametophyte 390, 39 1; mega- 

 . spore 3S3; ovule 3J7; strobilus 372 

 Euanthostrobilus 74 

 Evolutionary tendencies 406 

 Exarch 10, / 7 



Female gametophyte, Cordaitales 179; 

 Cycadales 132; Cycadofilicales 48; 

 evolutionary tendencies 419; Gink- 

 goales 203, 204, 208; Gnetales 373, 

 377, 379, 3^2, 383, 384; Pinaceae 259, 

 260, 261; Taxaceae 329, 330, 337 



Ferns, paleozoic 52; relationship to 

 Cycadofilicales 51 



Fertilization, Cycadales 148, 130; evolu- 

 tionary tendencies 423; Ginkgoales 

 209; Gnetales 391, 392; Pinaceae 284, 

 286, 287; Taxaceae 344, 345 



Flower, Gnetales 371, 372, 373, 375, 377, 

 380 



G 



Gametophytes, see male gametophyte 

 and female gametophyte 



Ginkgo, archegonium 208, 211; cotyle- 

 don section 1S8; embryo 211, 212, 

 213; female gametophyte 204, 208; 

 habit 186; leaf 1S7, 190, 199; male 

 gametophyte 207; ovulate strobilus 

 193, 196, ip7, 198; ovule 193, 196, 

 197, 198, 200, 201, 202; peduncle 

 section 199; seedling 190; staminate 

 strobilus 191, 192, 193 



Ginkgoales, archegonium 205, 208, 211; 

 distribution 215; embryo 210, 211, 

 212, 213; female gametophyte 203, 

 204, 208; history 215; leaf 187, 189, 

 190, 199; male gametophyte 206, 207; 

 megasporangium 194, 200, 201, 202; 



megaspore membrane 204, 203; micro- 

 sporangium 191, 192, 193; microsporo- 

 phyll 191, 192, 193; peduncle section 

 199; relationship 216; seedling 188, 

 190; strobilus 190, 191, 192, 193, 193, 

 196, 197, 198; vascular anatomy 187; 

 vegetative organs 185 



Gleichenia, protostele 3 



Gnetales 363; archegonium 385, 386; 

 chromosomes 384; distribution 402; 

 embryo 393, 394, 395, 397, 398, 400; 

 female gametophyte 375, 377, 379, 

 382, 383, 384; fertilization 391, 392; 

 history 402; leaf 369; male gameto- 

 phyte 389, 390, 391; megasporangium 



375, 376, 377; rnegaspore 384; ovule 



376, 377, 3S0, 3S2; microsporangium 

 371; relationship 402 ; seedling 399; 

 stamen 380; strobilus 370, 372, 374, 



375, 37^, 380', vascular anatomy 366; 

 vegetative organs 364 



Gnetopsis 37 



Gnetum, embryo 400; female game- 

 tophyte 373, 382, 383; flower 373; 

 habit 367, 370; megasporangium 375; 

 ovule 376, 380, 382; strobilus 375, 



376, 3S0 



H 



Hemiangiosperms 74 1 



Heterangium 12 



J 



Juniperus, fertilization 287; proembryo 

 294 



K 



Kaloxylon 14 



L 



Lagenostoma 31, 32, 33, 34, 33; micro- 

 spore 49 



Larix, megasporangium 233; strobilus 

 246 



Leaf gap 9; Adiantum /o 



Leaf, Bennettitales 71; Cordaitales 168, 

 169, 170; Cycadales 108, 109, no; 

 Cycadofilicales /, 21, 22, 24; evolu- 

 tionary' tendencies 412; Ginkgoales 

 187, 189, 190; Gnetales 369, 370; 



