264 



INDEX. 



Nipplewort, suppression of inter- 

 nodes, 116. 



Non-vascular plants, 14. 



Norantea, branched root, 67. 



Nucellus, and adventive buds, 138- 

 139 ; adventive embryos on, 139. 



Nuphar, bract and sejmls, 227. 



Nymphsea, displaced bract, 227 ; sup- 

 pression of sepal, 227. 



Oak, fused stems, 118 ; burrs, 129 ; 



laciniation of leaf, 164 ; forked 



leaf, 169, 221. 

 Ochrea, its origin, 203. 

 (Enanthe, displaced bracts, 226 ; 



fasciated umbel- ray, 226. 

 (Enothera, suppression of internodes, 



116-117. 



Oncophorus, adventitious rhizoids, 

 51-52. 



Onion, proliferation, 101 ; axillary 



bulbs, 112. 

 Ontogeny, of organs, 2 ; a guide to 



pliylogeny, 3, 228; of foliar organs, 



228-229. 



Oophyte, secondary protlialli on, 142. 



Ophioglossacete, forked leaf, 168, 

 174 ; sterile parts fertile, 185. 



Ophrys, fasciated root, 68. 



Opposite-decussate phyllotaxis, 169 ; 

 change to whorled, 216 ; change 

 to scattered, 217 ; change from 

 scattered to, 221 ; origin of, 

 233. 



Orange, compound leaf, 168. 



Orchis, fasciated root, 68. 



Organs, evolution and categories, 1. 



Ornithogalum, bulbils, 135. 



Orthotrichum, adventitious gemmse, 

 46 ; united leaves, 48 ; change of 

 protonemata into rhizoids, 50. 



Osmunda, secondary prothalli, 142 ; 

 sterile pinnae fertile, 185. 



Ovary, adventive shoots in, 138. 



Ovule, its development, 3 ; adventive 

 buds on, 138 ; pitcher on, 138. 



Ovuliferous scale, example of re- 

 version, 5 ; and axillary leaf, 118, 

 226 ; and fused scale-leaves, 194. 



Palms, dichotomy of stem, 85, 229 ; 

 ring-fasciation, 90; branching, 

 109-111 ; primitive type, 229. 



Pampinody of foliage-leaves, 183. 



Pandanales, branching, 111. 



Papaver, entire leaves, 191. 



Paradisia, axillary flowers, 112. 



Paripinnate leaf, 171. 



Paris, origin of false whorls, 234. 



Parsley, incised leaf, 165. 

 Parsnip, fasciated root, 67. 

 Passiflora, tendril on flower, 109. 

 Passion-flower, tendril on flower, 

 109. 



Pastinaca, fasciated root, 67. 



Pea, ring-fasciation, 90 ; phyllody of 



tendril, 158. 

 Peduncle, adnation to leaf and bract, 



209. 



Pelargonium, shoot-graft on petiole, 

 136 ; ascidium, 199 ; terminal leaf, 

 224. 



Pennywort, simple leaves, 173. 



Penzig, work by,vi; on ovule-shoots, 

 138 ; on stamen of pine, 185. 



Peperomia, stemless seedling, 239. 



Perianth-leaf, adnation to foliage- 

 leaf, 210. 



Petalody of scale-leaves, 1 60 ; of 

 foliage-leaves, 184. 



Peiroselinum, incised leaf, 165. 



Peyritsch on ovary-shoots, 138. 



Peziza lycoperdioides, see Aleuria. 



Pfeffer on teleology, 8. 



Phalsenopsis, fasciated root, 69. 



Phallus impudicus, forking, 15, 16 

 primitive fructification, SO. 



Phascum, leaf-enation, 48 ; adven- 

 titious rhizoids and protonemata, 

 51. 



Phaseolus, fasciated roots, 69 ; fascia- 

 tion-experiment, 95, 96 (fig.) ; 

 proliferation, 108 ; forked leaflet, 

 169 ; simple leaf, 189 ; suppression 

 of leaflet, 195. 



Philadelphia, union of leaves, 226 ; 

 terminal leaf, 226. 



Phlox, leaf-enation, 198, 201. 



Phyllode of acacia, 3. 



Phyllody of bracts, 152; of scale- 

 leaves, 156; of tendrils, 158; of 

 thoims, 158. 



Phyllonoma, adnation of foliage leaf, 

 209. 



Phyllotaxis, 214 ; conclusions on, 

 227. 



Phylogeny, 3, 228. 



Pht/scomitrium, androgynous inflore- 

 scence, 56. 



Phyton-theory, 1, 88, 127; and 

 phyllotaxis, 227 ; and terminal 

 leaves, 239. 



Phytoptus, cause of yew-gall, 2:23. 



Picea, root on cone-scale, 77 ; erect 

 branches, 123 ; staminody of bracts, 

 188 ; androgynous cone, 183 ; ovule 

 on bract, 189. 



Pileus, as flower, 14. 



