451 



MORPHOLOGY OF GYMNOSPERMS 



321, J22, J2J, J24; vascular anatomy 

 228, 315; vegetative organs 222, 315; 

 ventral canal cell 266, 26y 



Coniferophytes 59 



Conostoma 37 



Cordaianthus lyj, 175; ovules 176, 177; 

 microspore 177; stamen 174 



Cordaitales 163; archegonium //p; dis- 

 tribution 180; embryo 180; female 

 gametophyte 17 g; history 180; leaf 

 168, i6g, 170; male gametophyte 177, 

 178; megasporangium 174; micro- 

 sporangium 172, 773, 174; microspore 

 177; relationship 180; root 171; stamen 

 174; strobilus 172, 172, 175; vascular 

 anatomy 165; vegetative organs 164 



Cordaites, leaf i6g, 170; root 171; stem 

 section i6§, 166, 167; strobilus 172 



Cotyledon, evolutionary tendencies 428, 

 42 g; Pinaceae 297 



Crossotheca 25, 26, 27, 28, 2g 



Cryptomeria, female gametophyte 261; 

 male gametophyte 27g; strobilus 324 



Cunninghamia, male gametophyte 27g; 

 proembryo 2gi; strobilus 324 



Cupressineae 221; archegonia 269, 270; 

 distribution 301; history 305; male 

 cell 280; proembryo 2pj, 297; pro- 

 thallial tissue 277 



Cupressus, male gametophyte 280; stro- 

 bilus 324 



Cycadales 91; archegonium 133, 133; 

 distribution 156; embryo 150, 131, 

 132, 133, 134, 133; female game- 

 tophyte 132, 137; fertilization 148, 

 130; history 156; leaf 108, log, no; 

 male gametophyte 139, 141, 143, 144; 

 megasporangium 121; megaspore 127; 

 megaspore membrane ijp; megasporo- 

 phyll 124, 131; microsporangium 114, 

 118, iig, 120; microspore 140; micro- 

 sporophyll 116, 117; relationship 157; 

 root 112, 113; seedling structure 98, 

 gg, 100, loi, 102, 103, 104, 103, 106; 

 sperm 143, 146, 147; strobilus 114, 

 122, 123, 123; vascular anatomy 93; 

 vegetative organs 93 



Cycadella, ramentum 70 



Cycadeoidea, microsporophyll 77; seed 

 84; strobilus 73, 76, So, Si, 82; synan- 

 gium 78; trunk 37 



Cycadinocarpus, ovule section i/p 



Cycadofilicales i; distribution 51; em- 

 bryo 46; female gametophyte 48; 

 history 51; leaf /, 21, 22, 24; male 

 gametophyte 49; megasporangium 31; 

 microsporangium 25, 26, 27, 28, 2g; 

 microspore t!p, 50; origin 55; relation- 

 ship SI, 58; seed 31, 32, 33, 34, 33, 36; 

 38, 3g, 40, 42, 43, 44, 43; vascular 

 anatomy 12; vegetative organs 3 



Cycadophytes 59 



Cycadoxylon 16, 17 



Cycas, archegonium 133; embryo 132; 

 leaf log, in; male gametophyte 143; 

 megaspore membrane ijp; megasporo- 

 phyll 124; microsporophyll 117; root 

 tubercle 113; seed 130; sperm 143; 

 strobilus 123; ventral nucleus 136 



D 



Dacrydium, male gametophyte 340 



Dadoxylon 168 



Dioon, archegonium 133, 133, 138; 

 embryo 133, 134; female gametophyte 

 132; fertilization I4g; habit g2, g4; 

 leaf no, in; male gametophyte 141; 

 megaspore membrane i3g; megasporo- 

 phyll 124; microsporangium 120; 

 microsporophyll 116; ovule 126, 128, 

 i2g; pollen tube 128; seedling struc- 

 ture 104, 103; sperm 146; strobilus 

 122, 125; ventral nucleus 136 



Dory cordaites 164 



Ectophloic siphonostele 5 ; Osmunda 7 

 Embryo, Bennettitales 83, 84; Cordai- 

 tales 180; Cycadales 150, 131, 132, 

 133, 134, 133; Cycadofilicales 46; evolu- 

 tionary tendencies 426; Ginkgoales 

 210, 211, 212, 213; Gnetales 393, 

 394, 395, 397, 39^, 400; Pinaceae 287, 

 288, 28g, 2go, 2gi, 2g2, 2g3, 2g4, 295, 

 2g6, 2g7, 2g8, 2gg; Taxaceae 346, 

 347, 348, 349 



