18 13.Woodsia* 1. FELICES. 
PL end* cr . 
P. Ilvense, With , 774. 
P. hyperboreum, Swart. Syn. F. 39. 
Ceterach alpinum, Dec. Syn. FI. Gall. 1435. 
Woodsia hyperborea, Brown T.L. S. 11, 123. 
Redrattleleafed stonefern. 
Alpine rocks ; perennial ; June. 
Root cespitose ; fronds spreading*, 2 to 4 in. high, lan- 
ceolate, rather obtuse, both faces hairy ; rachis hairy ; leaf 
lets not very close, heartshape, pinnatifid, dilated at the 
base ; lobes rounded, rather convex, with the edges turned 
up, scarcely crenate, not armed ; sori roundish, hairy, nu- 
merous, growing at length quite close, brown. 
XIV. 14. TRICHOMANES. Dioscorides. Filmfern . 
Sori marginal ; capsules sessile, inserted into a cylindrical 
common receptacle, contained within a one-leaf, pitcher- 
shape open involucrum of a similar texture with the frond ; 
surculi creeping, downy; fronds pellucid, divided into areolae, 
very seldom undivided, commonly pinnatifid ; lobes one- 
ribbed ; involucra terminal ; receptacle mostly extended and 
elongated. 
Trichomanes Irevisetum . Shortlristle filmfern . 
Fronds 2 or 4, pinnatifid, smooth ; leaflets one-flowered ; 
lobes linear; with the margin unnicked; involucra topshape, 
hollow, wingless ; apex simple, not nicked ; receptacle hardly 
exserted ; stipes winged. 
Fiiix fcemina q. F. humijis repens, foliis pellucidis et sp!endentibus r 
caule alato Richardson, Raii Syn. 127, 14. 
Trichomanes pyxidiferum, Huds.Fl.Ang. 461. 
Hymenophyllum alaturn, Eng. B. 20, 1417. 
H. Tunbridgense (3. Smith F.A. 1142. 
Trichomanes brevisetum, Brown in Alton II . K. 5, 529. 
Cup goldilocks. 
Shady springs and rocks; perennial; May and June. 
Frond 4 or 5 inches high, thin, transparent, dark green. 
XV. 15. HYMENOPHYLLUM. Smith. Dwarffern , , 
Sori marginal, inserted into a cylindrical receptacle, in- 
cluded within a bivalve involucrum ; surculi erect, to- 
mentos e; fronds pellucid, divided into areolae, pinnatifid; 
lobes one-ribbed; involucrum terminal; receptacle not ex- 
serted. 
