INDEX 



191 



Lepidodendron, 67, 68, yi 

 Lepidophloios, 67, 69 

 Lepidophylluni, 70 

 Lepidostrobus, 71, 72 

 Leptopteris, 143, 145 

 Leptosporangiatae, 145, 147 

 leptosporangiate development, 16, 



145, 147 

 Ligulatae, 66 

 ligule, 66, 71, 78 

 Litostrobus, 100 

 Lornaria, 166 

 Lomariopsidoideae, 165 

 Lycopodiaceae, 50 

 Lycopodiales, 53 

 Lycopodites, 64 

 Lycopodium, 53, 55, 61, 67 

 Lycopsida, 50, 177 

 Lygodiiim, 152, 153 



Marattia, 12S, 130 



Marattiaceae, 127 



Marattiales, 127 



Marsilea, 168, i6g 



Marsileaceae, 168 



Marsileales, 168 



massnlae, 172, 173 



Matonia, 153, 156, i59 



Matoniaceae, 159 



Matonidium, 159 



Matteuccia, 156, 164 



megaphylls, 18, 114 



megaspores, 14, 73, 80, 90, 124, 170, 



172 

 meiosis, 13 

 meristeles, 20 

 mesarch xylem, 21 

 M esocalamites , 104 

 Metaclepsydropsis, 118, 120 

 metaxylem, 21 

 Microlepia, 156, 163 

 microphylls, 18, 179 

 microspores, 14, 73, 80, 89, 170, 172 

 Mixtae, 150 

 Mohria, 153 

 monoecism, 15 

 moonwort, 135 

 morphology, 11 

 mummifications, 23 

 mycorrhiza, 32, 39, 43, 45, 62, 87, 



133, 134, 136, 139, 155 



NECK CANAL CELL, 46, 62 



neck cell, 46 

 neoteny, 65 

 Nephrolepis, 156, 165 



OLEANDROIDEAE, 163 



Oligocarpia, 146 

 Oligomacrosporangiatae, 83 

 Onoclea, 164 

 Onocleoideae, 164 

 Ophioglossaceae, 127 

 Ophioglossales, 135 

 Ophioglossum, 135, 137 

 Osmunda, 142, 145, 181 

 Osmundaceae, 141 

 Osmundales, 141 

 Osmundidae, 141 

 Osmundites, 141 

 out-breeding, 16 

 overtopping, J77 



Palaeostachya, 102, 105 



parichnos strands, 70 



Pecopteris, 127, 128 



Pellaea, 167, 180 



perforated steles, 20 



periderm, 22, 69 



peripheral loops, 118, 120 



petrifactions, 23 



Phanerosorus, 156, 159 



phlobaphene, 40, 44 



phyletic slide, in Palaeostachya, 106 



in ferns, 163 

 Phyllitis, 156, 166, 180 

 Phylloglossum, 61, 65 

 phyllophore, 120 

 phyllotaxy, 59, 70, 77, 120 

 phylogeny, 12 

 Pilularia, 168, i6g 

 Pilulariaceae, 168 

 planation, 177 

 Platy cerium, 167 

 Pleiomacrosporangiatae, 83 

 Pleuromeia, 75, 78 

 Pleuromeiaceae, 68 

 polycyclic steles, 19, 21, 85, 159 

 polyploidy, 49, 66 

 Polypodiaceae, {sensu lato), 162 



[sensu stricto), 167 

 Polypodium, 167 

 polystely, 21, 84, 85, 116, 118 

 Polystichum, 156, 165 

 Pothocites, 103 



primary spermatogenous cell, 46 

 primitive characters in Filicales, 149 

 Primofilices, 115 

 prismatic tissue, 77 

 prothallial cell, 80, 90 

 prothallus, 14 

 Protocalamites, loi, 102 

 Protocalamostachys, 102, 103, 178 

 protocorm, 64 



