136 HOW TO KNOW THE FERNS 



Prickly Buckler Fern, 54 

 Prothallus, 17 



Pseudathryrium alpestre, 92 

 Pteridea, 38 

 Pteridosperms, 24 

 Pteris agttilina, 9, 38 



Quillwort, 7, 107 



Rachis, 4 



Reproduction, vegetative, 3 



Reproduction of Ferns, 13 et 



seq. 



RhizocarpecE) 12 

 Rhizome, 4 

 Ribbon Ferns, 38 

 Rigid Buckler Fern, 56 

 Roots, 5 



Rough Horsetail, 120 

 Royal Fern, II, 93 

 Rue-leaved Spleen wort, 71 

 Ruta graveolens, 71 



Salvinia, 12 



Salviniacece, 12 



Scaly Spleen wort, 29, 77 



Schizxacece, 1 1 



Scolopendrium rhizophyllum^ 3 



vulgare, 81 

 Sea Spleenwort, 130 

 Seed, 27 

 Selaginella grandis, 30 



spinosa, 12, 30, 106 

 Selaginellacece, 12, 26 

 Selaginellas, 30 



Life histories of, 29 

 Sex organs, 17 

 Shade Horsetail, 116 



12 



Smooth Naked Horsetail, 118 

 Soft Prickly Shield Fern, 60 

 Sori, 7, 14 

 Spermatozoids, 17 

 Spleen worts, 10, 66 et seq. 

 Sporangia, 6, 14 

 Spore cases (see Sporangia) 

 Spores, 5, 15 et seq. 

 Stag's Horn Moss, 101 

 Stipes, 5 



Three-branched Polypody (see 



Oak Fern) 

 Tree Ferns, 4, 1 1 

 Triangular Buckler Fern, 55 

 Trichomanes, 30 

 radicanS) 8, 33 

 Tunbridge Filmy Fern, 35 



Variegated Rough Horsetail, 



119 



Vascular Cryptogams, I et seq. 

 Economic importance of, 3 1 

 Vegetative reproduction, 3 



Walking Fern, 3 

 Wall Rue, 10, 70 

 Wardian cases, 130 

 Water Club Mosses, 7 

 Water Fern, 7, no 

 Water Horsetail, 118 

 Wolfs Claw, 10 1 

 Wood Horsetail, 117 

 Woods, Mr. Joseph, 61 

 Woodsia hyperborea, 61 



ilvensis, 62 

 Woods ias, 10 



Printed by MORRISON & GIBB LIMITED, Edinburgh 



