INDEX 



297 



716); habit of, 201 (Fig. 709); hairs of, 

 202; juvenile leaf of, 202 (Fig. 71'): 

 petiole of, 204 (Fig. 714); protostele of, 

 203 (Fig. 712);, receptacular system of, 

 205 ; rhizome of, 203 (Fig. 713) ; sori of, 

 205 (Fig. 715) ; sporangia of, 207 (Fig. 

 717); spore output of, 206; vascular ana- 

 tomyof, 202; venation of, 201 (Fig. 710) 



Cheiropleuria bicuspis^ habit of, 200 ; rhi- 

 zome of, 201 (Fig. 709) 



Christe?ise?ita^ 142, 272, 283 



C/irisiopleris, 232, 255, 280; anatomy of, 

 213 ; Copeland's genus, 2t8; diplodes- 

 mic state of, 224 ; relation to Dipteroids, 

 224; scales of, 218; venation of, 216 

 C. iricuspis, diplodesmic structures of, 216 

 (Fig. 725); fertile bladeof, 2 i4(Fig. 722); 

 habit of, 213 (Frontispiece), 214 (Fig. 

 722); soral region of, 216 (Fig. 724); 

 sporangia and paraphyses of, 217 ; spo- 

 rophyll of, 215 (Fig. 723); subsoral 

 system of, 217 



Cibotiiaii, 288 



Class of Ferns, archetype of, 26S 



Class Progression, 286 



Classification, artificial, 39 ; phyletic, 3, 39 



Clepsydroid trace of Cheiropleuria^ 204 



Climbing habit of the Bramble Fern, 29 



Coenopteridaceae, 269 



Coenosori, 24; of Blechmciii, 163, 165; 

 Dictyoxiphiuni, 34 ; oi Die Ilia, 28 ; His- 

 tiopteris, 49 ; of Nephrolepis, 22 ; of 

 Sadleria Cyatheoides, 172 (Fig. 694) 



Coenosorus, disintegration of, 181, 183, 190; 

 interruption of, 186 (Fig. 706); oi Blech- 

 ;///;;/, disintegration of, 195 ; of Bracken, 

 43 \o{ Doryopteris pedata,%^ (Fig. 639); 

 of Odontosoria, 29 ; of Paesia, 46 ; of 

 Pteridiiim aquilinuni, 43 (Fig. 608), 44 

 (Fig. 609) ; of Taenitis, 256 



Collenchyniatous thickenings, 96 



Common Bracken, habit of, 41 



Comparative Morphology, 285 



Comparison, of Aspidieae, 136; of Asple- 

 nieae, 149; of Blechnoid Ferns, 192; 

 of Davallioid Ferns, 35 ; of gametangia, 

 267; of Gymnogrammoid Ferns, 92; 

 of Onocleoid Ferns, 158; of Primitive 

 Gymnogrammoid Ferns, 72; of Vitta- 

 rieae, 246 ; of Woodsieae, 1 1 1 



Compensation-strand, 53 



Conditions, nature of the, 293 

 Cofiiogranime, 75, 97 



Convergent progress, 283 

 Corynepteris, 114, 269, 271, 272 

 Critical point, 290 



Cryptograinine, 72, 81, 93, 97, 281 ; varying 

 details of sporangia, 65 

 C. crispa, habit of, 67 (Fig. 625); spo- 

 rangia of, 68 ; sporophvU-segment of, 

 67 (Fig. 626) 



Cryptosorus, 254 



Cyathea, 115, 116, 277 

 C. sinitata, 194 



Cyatheaceae, comparison with Onocleoid 

 Ferns, 161 ; comparison with Wood- 

 sieae, 112; indusium of, 115 



Cyatheoids, indusium infer-uni of, 118 



Cyclodiutn, 127, 137 



Cyclflpeltis, 137 



Cyrtojuium, 127 



Cystopteris, 99, 1 19, 277, 282 ; dermal scales 

 of, 252 ; natural relations of, 250 ; pro- 

 thalli of, 252 ; sorus of, 251 (Fig. 748) ; 

 vascular system of, 252 

 C.fragilis, pinnule of, 251 (Fig. 747) ; soii 

 of, 250 



C. montana^ origin of sorus, 250 



Dafjaea, 142, 271 



Davallia, 12, 15, 16 (Fig. 588), 37, 274; 

 dermal scales of, 17; marginal origin 

 of the sorus of, 18 ; relatively advanced, 

 19; sporangia of, 19 ; sorus of, 17; vas- 

 cular system of, 1 5 



D. ackilleaefolia, 176 (Fig. 697) 

 D. caiiariensis, 17 (Fig. 588) 

 D. amtigua, 17 



D. disse'cta, vascular system of, 1 7 (Fig. 589) 

 D. dubia, 17 



D.griffithiana, young sorus of, 1 9 ( Fig. 5 9 1 ) 

 D.peniapkylla, 16 (Fig. 588); young so- 

 rus of, 1 8 

 D. pinnata, 24 

 Davallieae, 14, 15 



Davallioid Ferns, 14, 15 .yj^. (ch. XXXVll), 

 274 ; comparison of, 35 ; modification 

 of sori of, 36; natural grouping of, 37 

 Davallioid type, Diellia, 28 

 Davallioids, 2 



Dead-lock, mechanical, 276 

 Dennstaedtia, 1 5, 274 ; sorus of, 7 



D. dissecta, 8, 9 ; pinnule of, 8 (Fig. 584); 



sorus of, 8 (Fig. 584) 

 D. rubiginosa, 9 

 Dennstaedtiinae, 12 



Deparia, 121, 282 ; a Dennstaedtioid genus, 



259; a good genus, 257 ; history of, 257 



D. Moorei, a shade form, 259; marginal 



sori of, 258 (Fig. 752); young sori of, 



259 (Fig. 753) 



Derivatives, marginal, 273; superficial, 275 



Dermal hairs, 275 ; scales of Cystopteris, 2^2; 



scales of Bavallia, 17 ; scaXesoi Elapho- 



glossum, 237 



Diacalpe, 99, 119, 124, 277; antheridia of, 



100; habit and structure of, 105 ; hairs 



of, 100; leafand sorus of, 106 (Fig. 650); 



sorus of, 105 ; sporangium of, 107 (Fig. 



651) . . , 



Diagnosis, systematic or morphological, 40 

 Dicksonia, 274, 288 



