290 



INDEX. 



Perianth, polymerous, 129 ; gamo- 

 phyllous, 250. 



Peronospora, cause of petalody, 175. 



Petal, flowers axillary to, 21 ; division 

 of, 69 ; phyllody and virescence 

 of, 137-139; frondescent, 138; 

 squamody of, 139 ; sepalody of, 

 139-142, 276 ; labelliform, 143-1 46 ; 

 spurred, 146-148, 237 ; spurless, 

 148 ; staminody of, 153-160 ; fused 

 with " column," 160 ; carpellody 

 of, 160-161 ; morphological nature 

 of, 172-173, 205 ; derived from 

 carpels, 204-205 ; adnation to 

 sepal, 234-235, 242, 259, to 

 "column/ 5 236, to stamen, 236; 

 cohesion of, 249-253 ; suppression 

 of, 249, 253-254. 



Petalody, of stamens, 78, 116, 172- 

 181, 200, 276; of calyx, 135-136, 

 171. 



Petalomania, 77, 103. 



Petunia, double flowers, 78. 



Peyritsch on pelory, 149. 



Phajus, stamens changed into labella, 



145 : staminody of petals, 160. 

 Phaseolus, extra carpels, 92, 258; 



fusion of carpels, 258. 

 Pheasant's-eye, fasciated flower, 



46. 



Philadelphia, staminody of calyx, 

 136. 



Philvdracese, structure of perianth, 

 246. 



Phlox, leaf-enations, 162 ; abnormal 

 leaves, 200. 



Phoenix, hermaphodite flower, 97. 



Phyllody, of sepals, 13, 126; of 

 ovule, 91, 195-203; of stamens, 

 113; of entire flower, 123; of 

 corolla, 137-139; of androecium, 

 161; of gynoeceum, 193-203; of 

 sporophyll, 209. 



Phyllomania, 124. 



Phyllonoma, epiphyllar flowers, 234. 

 Phvllotaxy, change in, 61-62 ; spiral, 

 103, 259. 



Phyllotheca, ancestor of Equisetum, 

 213. 



PhytopUis, 40; cause of phyllody, 

 127. 



Picea, axillary proliferation, 22. 

 Pine, Norfolk Island, proliferation 

 in, 2. 



Pine-apple,proliferated inflorescence, 

 6. 



Pink, axillary proliferation, 21. 

 Pinus, axillary proliferation, 21-22 ; 

 ovuliferous stamens, 192. 



Pistil, virescent, 113, 270 ; primitive 

 type, 116; syn- and apocarpus, 

 116 ; formed from androecium, 

 190; phyllody of, 193-203; dia- 

 lysis of, 195 ; change from 

 " inferior " to " superior," 195 ; 

 squamody of, 203 ; staminody of, 

 209; change from "superior" 

 to " inferior," 235 ; adhesion of 

 stamens to, 236-237 ; bicarpellary, 

 245, 259 ; suppression of, 258 ; 

 syncarpous, 258 ; meiomerous, of 

 Panunculacese, 259. 



Pisum, carpellody of calyx, 137 ; 

 increase and fusion of carpels, 

 258. 



Pitcher-plant, conformation of leaf,, 

 200. 



Placentation, free central, 186-187 ;. 



primitive marginal, 195. 

 Plagius, homomorphic florets, 150. 

 Plantago, proliferated spike, 3,. 



flower, 6, 32. 

 [ Plantain, proliferated spike, 3, 6, 32.. 

 1 Platantheva, extra spurs, 134 ; spur- 



pelory, 146 ; staminode reverted 



to stamen, 182. 

 Platycerium, sterile fronds fertile,. 



212. 



Pleiotaxy, 53, 59. 

 Plum, double fruit, 50. 

 Plumbagineee, androecium, 79. 

 Plurisporangiate sporophyll, 101. 

 Podocarpese, ovuliferous scale, 23. 

 Podopterus. structure of perianth,. 

 242. 



Pogonia, reappearance of stamens, 

 82. 



Pollen in nucellus, 209. 

 Pollen-sacs, increase in number, 102. 

 Polyadelphy, 255. 

 Polyandry, 85. 



Polyanthus, 3 ; fasciated flower, 44- 

 46 ; phyllody of calyx, 126. 



Polycarpicse, 141, 243. 



Polygala, petalody of calyx, 135. 



Polygonum, leaf-enations, 162, 168- 

 170, 174 ; structure of perianth, 

 242. 



Polymery, due to svnanthy, 56, 238- 

 239 ; of corolla, 72 ; of calyx, 129, 

 203 ; of pistil, 203 ; of androecium, 

 257. 



Polypetalous flowers, 73, 112. 

 Polyphylly, 59, 60. 

 Pome, nature of, 12-14, 118, 139,. 

 189. 



Pomese, syncarpous ovary, 258. 

 Poplar, polyandry, 85. 



