134 HOW TO KNOW THE FERNS 



Cycads, 25 

 Cystopteris, 10 



alpinci, 65 



fragilis, 63 



montana, 64 



regia, 65 



Davallia bullata, 9 

 DavalliacetZ) 9 

 Druery, Mr. C. T., 91, 123 

 Dutch Rush, 32, 120 



Elaters, 21 



Elba, 62 



Embryo, 18 



Endosperm, 27 



English Maidenhair (^ 



Mountain Spleenwort) 

 Equisetites, 28 

 Equisetum, 112 et seq. 



arvense, 114 



fluvialiS) 116 



hyemale, 32, I2O 



limosum, 118 



maximum, 114 



palustre, 118 



pratensc, 116 



sylvaticum, 117 



telmateia, 114 



umbrosum, 116 



variegatum, 119 



Female organs (j^ Archegonia) 



Fern cases, 130 



Ferns, classification of, 7 / 



j^. 

 Collecting and preserving, 



122 ^ ^. 



Comparative sizes of, 29 

 Cultivation of, 129 * ^. 

 Economic importance of, 31 

 General characteristics of, 4 



Grown from spores, 131 

 Habitats of, 29, 128 

 In greenhouses, 130 

 Life histories of, 13 et seq. 



Ferns, number of genera and 



species, 28 



Reproduction of, 13 et seq. 

 Sometimes difficult to 



identify, 128 

 Where to find, 127 

 Fertilization of Ferns, 1 7 et seq. 

 Field Horsetail, 112 

 Filices, 8 



Filmy Ferns, 2, 8, 33, 131 

 Fir Club Moss, 19, 103 

 Flowering Fern (see Royal 



Fern) 

 Flowering Plants, probable 



origin of, 26 

 Forked Spleenwort, 68 

 Fossil botany, 23 et seq. 

 Fronds, 4 et seq. 



Gleicheniacea, II 



Gold and Silver Ferns, 10 



GrammitidccE, 10 



Great Horsetail, 1 14 



Green Spleenwort, 80 



Gyinniogramma leptophylla^ 



10, 100 



Gymnosperm, 27 

 GymnospermcZ) 27 



Hard Fern, 84 



Hard Prickly Shield Fern, 59 



Hartstongue, 82 



Hay-scented Buckler Fern, 55 



Holly Fern, 57 



Horsetails, 6, 27, 31, 112 



Life histories of, 21 

 HymcnophyllacecE, 8, 33 

 Hymenophyllum, 131 



tunbridgensis ', 8, 35 



ttnilaterale, 36 



Wilsoni, 8, 37 



Indusium, 8, 14 

 Interrupted Club Moss, 106 

 Isoetacece, 12 

 Isoetes, 7 



iX) 108 



