1 5 6 



GLOSSARY AND INDEX. 



Phanerophlebia, 117; also 16, 80. 

 Phegopteris, 108; also 5, 9, 16, 27, 



79- 



Phlebodium, 83; also ia, 79. 



Phyllitis, 107; also 3 , 6,15,19,26,81. 



Phymatodes, 83; also 79. 



Pilose (Lat. pilus, hairy), covered 

 with soft hairs. 



Pilularia, 124; also 39. 



Pinna (Lat. a feather), the primary 

 division of a compound frond. 



Pinnate (Lat. //, a feather), hav- 

 ing the divisions of the frond ar- 

 ranged on the two sides of a common 

 rachis. 



Pinnatifid (Lat. finna, a feather 

 and findere, to cleave), having the 

 sides of the frond, pinna, or pinnule 

 cut half-way or more to the midvein. 



Pinnule (Lat. pinnula, diminutive 

 of pinna, a feather), the secondary 

 division of a frond twice or more 

 compound. 



Polypodiaceae, n, 78. 



Polypodium, 81, also 6, 7, 10, n, 



12, 79. 



Polystichum, 115 ; also 16, 80. 



Pro-embryo, the thread-like pro- 

 longation between the germinating 

 spore and the prolhallium. 



Prothallium (Lat. pro, previous 

 to, and thallus, a young shoot), the 

 sexual generation of a fern, 20. 



Psilotum, 139; also 35. 



Pteridium, 91 ; also 80. 



Pteridoid (Gr. wTe'pis, fern, and 

 eZSos, form), fern-like in appearance. 



Pteridoid Phase, 22. 



Pteridophytes (Gr. irrtpi*, fern, 

 and 4>vr6v, a plant, 65. 



Pteris, 90 ; also 5, 13, 68, 80. 



Quadri- (Lat. guattuor, four), (as a 

 prefix) four, fourfold. 



Rachis (Gr. 'paxi?, the spine), the 

 continuation of the stipe through a 

 compound frond. 



Raphe (Gr. 'pd<i>n, a seam or suture), 

 the ridge which connects the sporo- 

 carp with its stem in Marsilia. 



Rattlesnake-fern. Vide Bo- 

 trychium. 



Receptacle (Lat. recipere, to re- 

 ceive), the part to which the sporan- 

 gia are attached, especially in the 



HvMENOPHVI.LACEjE. 



Reniform (Lat. rents, the kidneys), 

 kidney-shaped. 



Resurrection - plant. ViJe 

 Selaginella. 



Revolute (Lat. rerolvere, to roll 

 back), rolled backward ; said of the 

 margin of fronds. 



Rhizocarps. Vide Marsilea. 



Rhomboidal (Gr. 'po^/Sos, a rhomb, 

 and eifios, form), approaching a rhomb 

 in shape. 



Rock-brake. Vide Crypto- 

 gramma. 



Rock-moss. Vide Selagi- 

 nella. 



Roots, 25 



Rootstock, an underground stem, 

 8. 



S 



Salvinia, 125 ; also 39, 40. 



Salviniaceae, 125 ; also 3y . Litera- 

 ture of, 40. 



Scandent (Lat. scandere, to climb), 

 climbing. 



Schizaea, 76 ; also n, 18. 



Schizaeaceae, n, 75- 



Scolopendrium. Vide Phyl- 

 litis. 



Scouring-rush. Vide EquI- 

 setum. 



Segment, one of the divisions of a 

 pinnatifid frond. 



Selaginella, 137; 315034,35,36. 



Selaginellaceae, 137 ; also 34- 

 Literature of, 37. 



Sensitive-fern, ride Ono- 

 clea. 



Serrate (Lat. serra. a saw), having 

 the margin cut into teeth pointing 

 forward. 



