S32 
100. FILICES. 
Tribe V. Hymenophyllea:. 
15. Trichom'anes Linn. em. Sm. 
1. T. radicans (Sw.) ; fronds 3 or 4 times pinnatifid glabrous, 
segments uniform linear, involucres solitary in the axils of the 
upper segments, receptacle at first included ultiuiately very 
prominent.—^. B. 1417. T. speciosum WUld., JV. 305.— Fronds 
rather triangular, very much divided, 4 — 8 in. long, formed of 
hard wiry branched ribs each with a rather membratious wing. 
Rhizome black, downy, very long. Involucres scarcely winged. 
— The form called Andreiosii has lanceolate fronds and winged 
involucres. N. 315. — Very damp shady places, rare. Formerly 
at Bellbank, Yorkshire : (exactly Bolton's t. 30). N. Wales': 
Arran ! (S.). Killarney 1 [and other parts of Ireland], p. IX. X. 
E. S. I. 
16. Hymenophyl'lum Sm. Filmy-Fern. 
1. //. tunhridgen se (Sm.) ; fronds pinnate, pinnae distichous, 
segments linear undivided or bifid spinously-serrate, involucre 
compressed spinously-^errate, rachis broadly winged. — E. B. 162 
//. F. 43. N. 321. — Slender, delicate and small. Rhizome very 
long, threadshaped. Pinnae, rachis, and involucres in the same 
plane. Inv. -valves adpressed throughout the greater part of 
their length, slightly gibbous at the base. — Amongst moss in 
damp and shady places. P. VII. E. S. I. 
2. //. Wilsoni (Hook.) ; fronds pinnate, pinnae recurved, seg- 
ments linear undivided or bifid spinously-serrate, involucre in- 
flated entire, rachis slightly bordered. — E. B. S. 2686. //. /•'. 
44. //. ^milaterale Bory ? — Resembling the preceding, but the 
pinnae curve backwards and the involucres forwards. Inv.- 
valves convex or gibbous throughout, touching only by their 
edges which are ([uite entire. — Amongst moss in damp and 
shady places. P. VII. E. S. I. 
Suborder II. Osmundacece. Tr. VI. OsmuncUce. 
17. Osmun'da Linn. em. Sw. Flowering-Fern. 
1. 0. regdlis (L.) ; fronds bipinnate, pinnules oblong nearly 
entire, dilated and slightly auricled at the base, clusters panicled 
terminal.—^. B. 209. H. F. 45. X. 331.— Fronds erect or 
drooping, 1—8 feet high.— Boggy places. P. VII.— IX. E. S. I. 
