154 



GLOSSARY ANT) INDEX. 



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, 76. 



Polypodiese, 76. 



Polypodium, 82; also 6, 7, 10, u. 



12, 76. 



Pro-embryo, the thread-like pro- 

 longation between the germinating 

 spore and the prothallium. 



Prothallium (Lat. pro, previous 

 to, and thallus, a young shoot), the 

 sexual generation of a fern, 20. 



Protophyta (Gr. 7rpa>Tos, first, sim- 

 plest, and </>VTOV, a plant), 50. 



Psilotum, 139; also 35. 



Pterideae, 76. 



Pteridoid (Gr. irre'pis, fern, and 

 elfios, form), fern-like in appearance. 



Pteridoid Phase, 22. 



Pteridophytes (Gr. TTT>IS, fern, 

 and ^vTOf, a plant), 52, 75. 



Pteris, 9; also 5, 13, 68, 77. 



Pyrenomycetes, 52. Literature 

 of, 60. 



Q 



Quadri- (Lat. quattuor, four), (as at 

 prefix) four, fourfold. 



Rachis (Gr. 'pagi* the spine), the 

 continuation of the stipe through a 

 compound frond. 



Raphe (Gr. 'p a< Mt 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 

 HYMENOPHYLLACE^:. 



Reniform (Lat. renes, the kidneys), 

 kidney-shaped. 



Resurrection - plant. Vide 

 Selaginella. 



Re volute (Lat. revolvere, to roll 



back), rolled backward; said of the 



margin of fronds. 



Rhizocarps. Vide Marsilia. 

 Rhomboidal (Gr.'pdM/Bos, a rhomb, 



and eZSos, form), approaching a rhomb 



in shape. 

 Rock-brake. Vide Crypto- 



gramme. 

 Rock-moss. Vide Selagi- 



nella. 

 Roots, 25. 

 Rootstock, an underground stem 



8. 



Salvinia, 127; also 39, 40. 

 Salviniaceae, 127; also 39. Litera- 

 ture of, 40. 

 Scandent (Lat. s.andere, to climb), 



climbing. 



Schizaea, 123; also n, 18, 79. 

 Schizaeaceae, n, 79. 

 Schizomycetes, 51. Literature 



of. 57- 

 Scolopendrium, 107; also 3, 6, 15, 



19, 26, 78. 

 Scouring- rush. Vide Equi- 



setum. 

 Segment, one of the divisions of a 



pinnatifid frond. 



Selaginella, 140; also 34, 35, 36, 69. 

 Selaginellaceae, 140; also 34. 



Literature of, 37 

 Sensitive-fern. Vide Ono- 



clea. 

 Serrate (Lat. serra, a saw), having 



the margin cut into teeth pointing 



forward. 

 Sessile (Lat. sedere, to sit), without 



a stalk or petiole. 

 Setiform (Lat. seta, a bristle, and 



forma, form), bristle-like. 

 Shield-fern. V. Dryopteris. 

 Sigillariaceae, 6 7 . 

 Sinuate (Lat. sinus, a bending), 



having the margin alternately bend- 

 ing inward and outward. 

 Sinus (Lat. a bending), a recess or 



bay; the re-entering space between 



two lobes. 



