﻿INDEX. 



291 



Cycadeoidea colossalis, 7, 100 



Foliage of, 98, 99 



Frond succession in, 104 



Ramentum of, 52 

 Cycadeoidea dacotensis, *47, 99, *iii, no, *i32, 

 134. *i68, 186 



Bisexuality of, 184 



Bisporangiate strobilus described, 142, 143, 

 144-162, *I44, *I4S, *I46, *I47, 149, 167 



Bracts of, 146 



Discovery of type of, 7 



Fruiting habit and fecundation in, 184 



Growth-stages of, 186 



Leaf-base bundle pattern, *6l, *63 



Leaf-base bundle structure. 64, *6s 



Leaf-base spirals of, *59 



Ovulate cone of, 133, 147-149, ^156 



Peduncle, 146, *I50, *i5i 



Peduncle growth in, 178 



Pollen of, *I59, * 160- 162 



Preservation of cones of, 108 



Ramentum, 53, 54 



Restoration of emergent bisporangiate stro- 

 bilus, *I38 



Staminate disk of, *I49-i62, *I50, *I5I, *I56, 

 167, 229 



Synangia of, *I57, *I58, 159, *i62 



Young ovulate axes of (T. 214), 176-186, 

 *i78. *i79, *i8o, *i8i, *i82, *i83. *i84. 

 *i8 5 

 Cycadeoidea etrusca, 5, 12 



Bisporangiate strobilus of, 139-141, 167 



Pollen of, 139, *iS9 



Height of, 33 



Scant ramentum of, 54 

 Cycadeoidea excelsa, stature of, 33. 44 

 Cycadeoidea gigantea, 16 



Habitus of, 33, 36 



Leaf-base bundle distribution, 59. 62 



Leaf-base bundles of, 64 



Nuclei (?) of medullar cells, 78 



Stature of, 16, 36, 44 



Ramentum of, *Si, 53 

 Cycadeoidea Goucheriana, *32 



Cycadeoidea heliochorea, bisporangiate flower- 

 bud of, *i6i, *i62 

 Cycadeoidea ingens, Si-97, 82, *83, *88. *8o,, *93, 98, 

 100, 102, 104, 139, 155, 163 



Comparative trunk size and form, 28. 36 



Discovery of staminate flower-bud, 141, 142 



Flower-bud of, 162, 163, 167, 229 



Foliage of, 84-97 



Frond truncation in, 90 



Full-grown pinnules and fronds of, 90 



Leaf-base bundle grouping in, *59, 63 



Leaf bases of, *S3, *S8 



Method for plotting pinnule outline and ven- 

 ation, 97 



Petiole preservation in. 91 



Pinnules, 87, 90, 92 



Prefoliation. 86, *88. *93 



Restoration of strobilus of, *io6 



Trunk No. 208, *facing 81, 94-97 



Cycadeoidea in gens — Continued. 



Woody cylinder of, 78-80 

 Cycadeoidea intermedia, 139 

 Cycadeoidea Jenncyana, 95, 190 



Flower-bud of, 143, 162, 163, 167, 230 



Leaf-base bundle pattern, 60 



Leaf bases, 58 



Ovulate cone of, 131, 132 



Tallest cycadeoidean species. 33, 34, 35. 36, 44 



Trunk form of, 28, 34 



Woody cylinder of, 78-80 

 Cycadeoidea Maraniana, 139 

 Cycadeoidea Marshiana, *i33, *i34 



Bracts of, 115 



Branching of, 38-42 



Fancied resemblances of, 37 



Growth-stages of, 186 



Large basal branches of, 40 



Large section through summit of trunk. 102 



Large size of branching forms. 38 



Ovulate cone of, 135, 136 



Ramentum, 53 

 Cycadeoidea inarylandica, *4 



Specimens of, in Yale collection, 6 

 Cycadeoidea Masseiana, 12, 22 

 Cycadeoidea McBridei, *63 



Bisexuality of, 130, 131 

 Cycadeoidea megalophylla, 33 

 Cycadeoidea microtnyela, 13, 28 



Leaf-base bundles, 61, 64 



Pittings of xylem cells, 75 



Type possibly a branch, 31 

 Cycadeoidea microphylla, 33 

 Cycadeoidea minnekahtensis, 38, 98. 135 



Collection of type, 7 



Ramentum, 53 

 Cycadeoidea Montiana, 12, 18 

 Cycadeoidea nigra, 7, 12. 22 



Height of, 33 



Leaf-base bundle pattern, 60, *6i, 62, *63, 64 



Peduncle and bracts of, *6i 



Ramentum, 52 

 Cycadeoidea Paynei, 7. 130 



Bisexuality of, 130. 131 



Bisporangiate flower-bud of. 163-164, 167 



Bracts, 115, *n6 



Young fruits of. 174 

 Cycadeoidea pulcherrima, 7. *i7i 



Founded on a growth-stage. 186 

 Cycadeoidea Raiiineriana, stature of, 33 

 Cycadeoidea Reichcnbachiana, 12, 33 

 Cycadeoidea rhombica, 28, 33 

 Cycadeoidea Stantoni, culmination of fructifica- 

 tion in, 185 

 Cycadeoidea Stilwelli, *63 



Scant ramentum of, 54 



Stature of, 33 

 Cycadeoidea superba, 167 



Collection of type. 43 



Leaf-base bundle pattern of, *63 



Ovulate strobilus of, *I35 



Resemblance to Cycas rcvoluta, 43 



Restoration of ovulate strobilus, *I36 



