64 
HISTORY OF BRITISH FERNS. 
3. C. montana, Link. — Fronds triangular, tripinnate. Plate 
XIV. fig. 2. 
PoLTPODIACEiE § PeRANEME.®. 
Genus 14. WOODSIA, It. Brown. 
1. W. ilvensis, B. Brown. — Fronds lanceolate, hairy- 
squamous ; pinnae oblong, lobed. Plate III. fig. 2. 
2. W. alpina, Gray. — Fronds linear, almost smooth ; pin- 
nae bluntly triangular, lobed. Plate IV. fig. 1. 
POLYPODIACE® § HyMENOPHYLLE®. 
Genus 15. TRICHOMANES, Linnceus. 
1. T. radicans, Swartz. — The only British species. Plate 
XVIII. fig. 1. 
Genus \Q. HYMENOPHYLLUM, 
1. H. tnnbridgense. Smith. — Pinnae vertical, involucres 
compressed, serrate. Plate XV. fig. 2. 
2. H. unilaterale, Willdenow. — Pinnae deflexed, involucres 
inflated, entire. Plate XV. flg. 3. 
OSMUNDACE®. 
Genus 17. OSMUNDA, Linnceus. 
1. 0. regalis, Linnceus. — The only British species. Plate 
XIX. fig. 2. 
