300 



INDEX 



Homoplasy, 284, 292 

 Hiimata, 20, yj 



H. heterop/iylla, 20 

 Hydropterids, 260 

 Hymenolepis^ 192, 213, 232, 255, 280 



H. spicata, details of, 223 (Fig. 731); 

 habit of, 222 ; venatio anexeti of, 222 

 Hymenophyllaceae, 273 

 Hypcderris, 99, 119, 277; a synthetic type, 

 113; habit of, loi (Fig. 646); habit 

 and structure of, 104; soral condition 

 of, 104; sorus of, loi (Fig. 646) ; young 

 sporangia of, 104 (Fig. 649) 

 Hypolepis, 5 sqq. (ch. XXXVl), 15, 81, 92, 

 274, 278, 288 ; habit of, 7 ; sorus of, 7 

 H. Bernh., synonymy of, 5 (Fig. 582) 

 H. tiig;rescens^ mature sorus of, 9 (Fig. 



585) 

 H. repens, pinnule of, 9 (Fig. 586) ; vas- 

 cular system of, 8 (Fig. 583) ; young 

 sorus of, 10 (Fig. 587) 



"Incertae sedis," genera, 3 



Incidence of size-factor, 31 



Index FiUciini, 4 



Indusioid margin oi Pellaea i/itraiuar^hui- 

 lis, 93 (Fig. 638) 



Indusium, abortion of, 7, 12, 129, 288 ; abor- 

 tion of lower, 47; basal, 112; elimina- 

 tion of, 51 ; elimination of lower, 12, 23 ; 

 orbicular, oi Polysiichinn, 128; various 

 types of, 117; of A}-thropieris, abortion 

 of, 36; of Aspidiiim {Polystichum) 

 lobatum, 129 (Fig. 660); o'i Afhyriitin 

 alpestre^ 145; of Ceferac/i, 147; of 

 Cyatheaceae, 115; oi Matonia, 114; of 

 Phyllitis^ 196; oi Pleurosorus^ 147; of 

 Polysticlnau^ 114; of Shield Fern, 124; 

 of Woodsia, 102, 103 (Figs. 647, 648) 



Indtcsinm inferum^ morphology, 114; of 

 Cyatheoids, 118; of Superficiales, 114, 

 116; origin of, 117, 118 



Indiisiiini super 11 in of Aspiduiin, 127; of 

 Polysiichicni, 127 



Inherited feature, ontogenetic adjustment 

 becomes an. 290 ; secular establishment 

 of, 292 



Initiative to develop, 286 



Internal embryology, 267 



Jatnesonia, 68, 71, 93, 97, 281 ; an Acrosti- 



choid, 70 ; habit of, 69 (Fig. 628) ; hairs 



of, 70; spore-counts of, 70 

 /. verticalis^ fertile pinna of, 70 (Fig. 629) 

 J uvenile leaf of Cheiropleuria, 202 (Fig. 711); 



oi Platycerium Veitchii, 202 (Fig. 711) 

 Juvenile leaves of Ant?'ophyum, 247 (Fig. 



746) ; of Hectstopteris, 247 (Fig. 746) 



Laboratory time, limits of, 291 

 Laccopteris, 228 



Land Plants, alternation stabilized in, 265 



Lastraea^ 132 



'Lea.ioi Antropkyttjn semicostatiuii, 242 (Fig. 

 742); of Diacalpe^ 106 (Fig. 650); of 

 Peranetna^ 1 06 ( Fig. 650) ; oi Syiigramnie 

 bor7ieefisis,22)S (Fig.735); Sphenopterid, 

 141 



Leaf-blade of Dictyoxiphiuin^ 34 



Leaf-margin, relation of the sorus to, 22 



Leaf-segments of Histiopteris iftcisa, 49 

 (Fig. 614) 



Leaf-trace of Histiopteris, 48 ; of Platy- 

 ceriion, .209 



Leaves, of Lindsaya, 32 ; of Platycerium, 

 208; oi Stenoseniia aurita, 135 (Fig. 

 667) 



Leptochilus, 131, 137, 277; venation of, 132 

 (Fig. 663) 

 L. cuspidattis, 132 ; Acrostichoid state of, 

 132, 133 (Fig. 664); young sporophyll 

 of, 134 (Fig. 665) 

 L. tricuspis, 218 

 L. varians, 218 



Leptolepia, 13, 15 



L. Novae Zelandiae, 13, 16 



Leptosporangiate Ferns, i 



Leptosporangiate state, 284 



Limiting factors, 286 



Lindsaya, 31, 38, 274, 278; leaves of, 32; 

 rhizome of, 31 (Fig. 600 bis); sorus of, 

 32 ; sorus, development of, 33 ; spo- 

 rangia of, 34 (Fig. 604); -structure of 

 stele, 24 

 L. lancea, marginal region of a pinna of, 



32 (Fig. 602); pinna of, 32 (Fig. 601) 

 L. linearis, stele of, 31 (Fig. 600); young 

 sorus of, ■i,'}) (Fig. 603) 



Lindsayopsis, 29 



Linkage of sori, 24 



Litobrochia, 48, 56 



Llavea, 6, 72, 81, 93, 97, 281 ; sporangia of, 

 65 ; vascular system of, 65 

 L. cordifolia, habit of, 66 (Fig. 624) 



Loniaria, 163, 165 (Fig. 688), 192; soral 

 linkage of, 192 ; type of pinna of, 167 



" Lonchitidinae" of Prantl, 41 



LoncJiitis, 61 ; an intermediate type, 46 

 L. aurita, pinna of, 48 (Fig. 612) 



Lophosoria, in, 115, 116, 276 



Lower indusium, abortion of, 47, 54 ; elimi- 

 nation of, 12, 23; oi Anopteris hexa- 

 gona, 55 



Loxsomaceae, 273 



Luei'ssenia, 121, 127, 137 



Lygodiuni, 80, 96, 272 



Maidenhair Ferns, 78, 80, 94 



Male Shield Fern, 121; anatomy of, 122; 



habit of, 122 

 Marattia, 271 

 Marattiaceae, 271 



