INDEX 



301 



Marginal derivatives, 273 ; series, 278 ; 

 sori, lateral fusion of, 22 ; sori of Depa- 

 ria Moore i, 258 (Fig. 752) 



Marginales,27i,272 ; Salviniaceae probably 

 gradate, 262 



Marsh Buckler Fern, 120 



Malo7iia, 200, 280; indusium of, 114 

 M. sarmentosa^ 222 



Matoniaceae, 272 



Matonidiui>i, 228 



Matonioid-Dipteroid Ferns, geographical 

 history of, 231 ; affinity, Acrostichoid 

 state of, 228; affinity, progressive fea- 

 tures of, 227 



Matteuccia^ 152, 278; sori of, 154 



M. inte7'inedia^ 162, 173, 192, 278; de- 

 velopment of sorus of, 157 (Fig. 683) ; 

 habit of, 156 (Fig. 682); non-indusiate 

 sori of, 155 ; sporangiumof,i57(Fig. 684) 

 M. ot'ientalis, 162; venation of, 154 (Fig. 



680) 

 M. striitltiopteris (Ostrich Fern), 152, 153 

 (Fig.678), 1 62; petiole of, 1 60 (Fig. 685); 

 stock of, 154 (Fig. 679) 



Mechanical dead-lock, 276 



Medullary system oi Acrostichum aiireum^ 

 59 (Fig. 623); of Ceratopteris^ 71 ; of 

 Diplaziniji esculentitm, 146 



Mega-gametangia (archegonia), 265 



Mega-sporangia, 265 



Mendelian analysis, 285 ; segregation, 286 



Menisciiini^ 127, 131, 277 



Meristele, petiolar, of Diellia falcata^ 27 

 (Fig. 596) 



Mesochlaetia, 121, 137 



Metaxya, iii, 116, 276, 279; characters of, 



233 



M. 7-ostrata^ pinna of, 233 (Fig. 734) 

 Metaxyoid Ferns, 233 sqq. (ch. XLVl), 238 

 Micro-gametangia (antheridia), 265 

 Mic7'olepia^ 9, 15 



M. {DavalUa) spcluncae, 17, 25 (Fig. 



595) 



Micro-sporangia, 265 



Mixed sorus, 12 ; change to, 288 ; condition 

 of, 56 ; of Ft en's {Litobrochid) podo- 

 phylla, 57 



Mnemic Theory, 291 ; as a woi-king hypo- 

 thesis, 292 



Mohria, 84, 96, 272, 281 



M. caff7-oriiin^ marginal sporangia of, 95 

 (Fig. 645) 



Motiachosonnn, 13 ; affinity of, 254 

 M. sicbdigitatiim, 13 (Fig. 587 bis) 



Monograinine, 241, 247, 248 



Morphology, Comparative, 285 



Mosses, archegonia bi-sexual in certain, 

 266 



Mountain Buckler Fern, 120 



Mutation Theory, 287 



Mutations, 287 



Natural Selection, 286 



Nature of the conditions, 293 ; of the organ- 

 ism, 293 

 Neocheiropteris^ 121, 232, 280 ; fertile pinna 



of, 221 (Fig. 730); scales of, 220 (Fig. 



728); sori of, 220 (Fig. 729) 

 N. palmatopedata^ habit of, 218, 219 (Fig. 



727) 

 Nephrolepis^ 20, 38, 274, 278 ; coenosori of, 



22; sori of, 21 (Fig. 592), 22; stolons 



of, 20; young sorus of, 22 (Fig. 593) 

 Notholaeiia, 81, 89, 98, 281 ; anatomy of, 90 ; 



comparison with Schizaeaceae, 94 ; 



glandular hairs of, 91; habit of, 90; 



sporangia of, 90 ; spore-counts of, 91 

 N. trichoiiiaiwides^ young sporangia of, 



91 (Fig. 644) 



02i\s.¥&YX\{D>yopte?-is Li/inaeana), 120, 121, 



129 

 Ochropteris^ 62 

 Odontosoria, 28, 38; anatomy of, 29; coeno- 



sorus of, 29; rhizome of, 31 (Fig. 600 



bis) 

 O. aculenia, 25 (Fig. 595), 29; vascular 



system of, 25 (Fig. 594) 

 O. bifida, 25 (Fig. 595) 

 O.fuinariotdes, 29 

 O. retiisa, development of the sorus of, 30 



(Fig. 598); sporangium of, 30 (Fig. 599) 

 Oleandra, 38 ; a "genus incertae sedis," 23 

 Oligocarpia, ill, 228, 275 

 Onoclea, 152, 278 



O. sensibiiis, 162 ; habit of, 153 (Fig. 678), 



157 ; young sorus of, 155 (Fig. 681) 

 Onocleeae, phyletic grouping of, 162 

 Onocleinae, 99, 152 



Onocleoid Ferns, 152 sqq. (ch. XLlli) ; com- 

 parison of, 158; comparison with Cya- 



theaceae, 161 ; perispore in, 166 

 Ontogenetic adjustment, 289 ; becomes an 



inherited feature, 290 

 Onychiopsis, 68, 93 

 Onychiiini, 67, 97 

 Ophioglossaceae, 270 

 Ophioglossian, 283 

 Organisation, general drift of, 283 

 Organism, an integer or whole, 283 ; nature 



of the, 293 

 Osi/iunda, 72, 271, 288 1 



Osmundaceae, 271 

 Ostrich Fern {Matteiiccia striithiopteris). 



152, i53(Fig. 67S) 



coenosorus of, 46; 







Paesia, 46, 61, 274, 28c 

 hairs of, 46 

 P. viscosa, young sorus of, 47 (Fi 

 Para!ie7fia, lateral pouches of, 128 

 Paraphyses of CImstopteris tricuspis, 217 

 Parsley Fern, 65 

 Pellaea, 81, 98, 282; anatomy of, 87 ; habit 



