Xll TABLE OF CONTENTS. 



PAGE 



frond, 208210 ; formation of the pinnae, 209, 210 ; growth of the 

 first root, 210, 211; growth of the primary axis, 211; growth 

 of the stem-bud and fronds, 211 214; structure of the stem 

 and formation of the vascular bundles, 213 222 ; formation 

 of new fronds, 221 223; development of roots, 223, 224; 

 ramification of roots, 224; increase of the tendency to furca- 

 tion in terminal bud with the age of the shoot, 224; unbranched, 

 frondless, terminal shoots, 224, 225 ; position of buds from which 

 new shoots are produced, 225, 226 ; vegetation of Aspidium filix-mas, 

 226 245 ; production of first frond, 226 ; second and following 

 fronds, 227 ; rapid increase in thickness of the stem beyond the 

 fifth or sixth frond, 227; cell-multiplication in the terminal bud, 

 227, 228 ; arrangement of the fronds, 228 ; production of first 

 vascular bundles, 228, 229; growth of Aspidium filix-mas in the 

 second year, 229 ; production of roots in the mature plant from 

 vascular bundles of the stipes, 229, 230 ; production of vascular 

 bundles in the stem, 230 232 ; form and development of the apical- 

 cell, 232 239; table of measurements of apical cells in Aspidium filix- 

 mas, Aspidium spinulosum, and Asplenium filix-femina, 233 ; relations 

 of base and sides of apical cell in various states of Aspidium filix-mas, 

 234 236 ; irregularly shaped apical-cells of Aspidium filix-mas and 

 Aspidium spinulosum, 236 ; explanation of the facts connected with 

 the apical cell, 236239 ; coincidence of two-edged form of apical cell 

 and bilinear arrangement of fronds in various ferns, 239; cell-succession 

 in apex of leaf-buds of flowering plants, 239, 240 ; table of measure- 

 ments of apical cells,240; cell-succession in the terminal bud oiAspidium 

 filix-mas and Aspidium spinulosum, 241; mucilage surrounding the bud, 

 242 ; development of scales on the terminal bud, 242,243 ; Kunze on 

 the bodies at the base of the stipes in Hemitelia capensis, 2'3,note; 

 development of frond in Aspidium filix-mas, 243 ; formation of roots, 

 243, 244; rarity of furcation of the terminal bud in Aspidium filix-mas, 

 244; adventitious buds in Aspidium filix-mas and Aspidium spinulosum, 

 245; Schleiden's supposed axillary buds, 245, o/e; vegetation ot Asplenium 

 filix-femina, Asplenium Bellangeri, Struthiopteris Germanica, Nephrolepis 

 undulata and N. splendens, 245 248 ; peculiarities in the growth of 

 Asplenium filix-femina, 246 ; development of adventitious buds and 

 furcation of the stem in that fern, 247 ; adventitious shoots of Stru- 

 thiopteris Germanica, 247 ; production of adventitious buds on the 

 frond of Asplenium Bellangeri, 247 ; development of runners iu 

 Nephrolepis, 247, 248 ; vegetation of Polypodium and Niphobolus, 

 248 251 ; two-edged form of apical cell and bilinear arrangement of 

 fronds in Niphobolus and Polypodium, 248 ; not occurring in Poly- 

 podium vulgare, 248 ; growth of P. vulgare and Bryopteris, 248 

 249 ; formation of the stipes and development of scales in the above 

 ferns, 249 ; development of the fronds, 249 251 ; scales at the base 

 of the fronds, 251; vascular bundles and roots, 251; vegetation of 

 Platycerium alcicorne, 251 254; development of the fronds, 251 

 253 ; structure of the stem and roots, 253 ; form of the apical cell, 

 253; vegetation of Marallia cicutafolia, 254256; statements of 

 De Vriese and Hartig on the devolopment of the Marattiaceae, 

 254, note ; form of the apical cell, 254 ; growth of the fronds, 254, 

 255; development of the Perula, 255; development of scales and 

 roots, 255 ; development of new plants from fragments of Marattia 

 cicutcefolia, 255, 256 ; development of the fruit and spores of ferns, 

 250,257. Historical review : 257 266; reproduction of ferns by 



