154 



GLOSSARY AND INDEX. 



and Jiiidere, to cleave'), having the 

 sides of the frond, pinna, or pinnule 

 cut half-way or more to themidvein. 



Pinnule (Lat. pinnula, diminutive 

 of pinna^ a feather), the secondary 

 division of a frond twice or more 

 compound. 



Polypodlaceae, n, 76. 



Polypodieae, 76. 



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

 12, 76. 



Pro-embryo, the thread-like pro- 

 longation between the germinating 

 spore and the prothallium. 



Prothalllum (Lat. pro, previous 

 to, and thixllus^ a young shoot), the 

 sexual generation of a fern, 20. 



Protophyta (Gr. t<pu,To<;, first, sim- 

 plest, and <J)vToV, a plant), 50. 



Psilotum, 139; also 35. 



Pterideae, 76. 



Pteridoid (Gr. Trrept?, fern, and 

 eI6o9, form), fern like in appearance. 



Pteridoid Phase, 22. 



Pteridophytes (Gr. Trrepi?, fern, 

 and 0ut6i', a plant), 52, 75. 



Pterls, 90; also 5, 13, 68, 77. 



Pyrenomycetes, 52.— Literature 

 of, 60. 



Quadri- (Lat. quattuor, four), (as 3i 

 prefix) four, fourfold. 



Rachis (Gr. 'pdxis. the spine), the 

 continuation of the stipe through a 

 compound frond. 



Raphe (Gr. 'pai/»/, a seam or suture), 

 the ridge which connects the sporo- 

 carp with its stem in Marsilia. 



Rattlesnake-fern. I'ide Bo- 

 trychium. 



Receptacle (Lat. recipere, to re- 

 ceive), the part to which the sporan- 

 gia are attached, especially in the 

 HVMENOPHVLI.ACE.E. • 



Reniform iLat. renes, the kidneys), 

 kidney-shaped. 



Resurrection - plant. I'ide 

 Selaginella. 



Revolute (Lat. revoh'ere, to roll 

 back), rolled backward; said of the 

 margin of fronds. 



Rhizocarps. T/V/i" Marsilia. 



Rhomboidal iGr. 'pofi(3o9, a rhomb, 

 and elSos, form), approaching a rhomb 

 in shape. 



Rock-brake. Vide Crypto- 

 grainme. 



Rock-moss. Vide Selagi- 

 nella. 



Roots, 25. 



Rootstock, an underground stem 



Salvinia, 127; also 39, 40. 



Salviniaceae, 127; also 39. -Litera- 

 ture of, 40. 



Scandent (Lat. s andeie, to climb), 

 climbing. 



Schizaea, 123; also n, 18, 79. 



Schizaeacese, n, 79. 



Schizomycetes, 51.— Literature 



of, 57- 



Scolopendrium, 107; also3, 6, 15, 



19, 26, 78. 

 Scouring- rush. Vide Equi- 



setum. 

 Segment, one of the divisions of a 



pinnatitid 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 (I^at. sedere, to sit), without 



a stalk or petiole. 

 Setiform (Lat. sefii, a bristle, and 



/br/ua. form), bristle-like. 

 Shield-fern. V. Dryopteris. 

 Sigillariaceae, 67. 

 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. 



