Index 



Ferns, fertilization of, 14 

 fronds of, 9, 17 

 growth from spores, 12 

 habitats of, 7-9 

 leaf-divisions of, 18 

 life-history of, 12-15 



Field Horsetail, 77, 78 



Filmy Ferns, 47 



Fir Clubmoss, 66, 67 



Flowering Fern, 34 



Forked Spleenwort, 25 



Fossil Plants, 6, 7 



Great Water Horsetail, 80 

 Green Spleenwort, 58 



Hard Fern, 62, 63 

 Hart's Tongue Fern, 51, 52 

 Hay-scented Fern, 61, 62 

 Holly Fern, 59 

 Horsetails, 74-85 



ancient, 4 

 Hymenopkyllum, 50 



Tunbridgense, 50 



unilateral, 50 



Indusium, 10 

 Interrupted Clubmoss, 69 

 Isoetes lac us tr is, 71 



Lady Fern, 43-45 

 Lanceolate Spleenwort, 29 

 Lesser Alpine Clubmoss, 65, 70 

 Life-history of Ferns, 12-15 

 Lomaria spicant, 63 

 Lycopodium, 65 



alpinum, 68 



annotinum, 69 



c lav at urn, 66 



inundatum, 68 



Selago, 66, 67 



Maidenhair Fern, 32 



Spleenwort, 23, 24 

 Male Fern, 42, 45 

 Marsh Buckler Fern, 35 



Clubmoss, 68 



Horsetail, 81, 82 

 Moonwort Fern, 18, 38, 39 

 Mountain Bladder Fern, 57 



Buckler Fern, 60 



Nephrodium, 41 

 cemulum, 62 

 cr is tat urn, 37 

 Filix-mas, 42 

 oreopteris, 60 

 rigidum, 6 1 

 Tbelypteris, 36 

 spinulosum, 41 



Oak Fern, 17,43, 44 

 One-sided Filmy Fern, 49, 50 

 Osmunda regalis, 34 

 Opkioglossum vulgatum, 38 

 Parsley Fern, 54, 55 

 Pepperwort, 72 

 Pill wort, 72, 73 

 Pilula glotulifera, j 3 

 Pinnae, 1 8 

 Pinnules, 19 

 Prickly Buckler Fern, 41 

 Prothallia of horsetails, 76 



clubmosses, 64 

 Prothallium of fern, 13, 14 

 Polypodies, 26 

 Polypodium alpestre, 60 



Dryopteris, 43 



Pbegopteris, 40, 41 



vulgar e, 26, 27 

 Pteris, 53 



aquilina, 54 



Quillwort, 71, 72 



