GUIDE 



50. BROAD BEECH FERN 



Phegopteris hexagonoptera 



Larger than the preceding species, fronds triangular, as broad or 

 broader than long, once-pinnate, pinnae pinnatifid, lowest pair very 

 large, basal segments of pinnae forming a continuous, many-angled 

 wing along the rachis. In dry woods and on hill-sides. P. 188. 



51. OAK FERN 



Phegopteris Dryopteris 



Medium-sized, fronds thin and delicate, broadly triangular, spread- 

 ing, ternate, the three divisions stalked, each division pinnate, pin' 

 nae pinnatifid. In moist woods. P. 190. 



52. BULBLET BLADDER FERN 



Cystopteris bulbifera 



Fronds delicate, elongated, tapering above from a broad base, 2- 

 3 pinnate or pinnatifid, bearing fleshy bulblets beneath. On wet 

 rocks, preferring limestone. P. 194. 



53. COMMON BLADDER FERN 



Cystopteris fragilis 



Medium-sized, fronds thin, oblong-lanceolate, 2-3 pinnate or 

 pinnatifid. On rocks and in moist woods. P. 198. 



54. RUSTY WOODSIA 



Woodsia Ilvensis 



Small, more or less covered with rusty hairs, fronds lanceolate, 

 once-pinnate, pinnae pinnatifid. On exposed rocks. P. 200. 



55. BLUNT-LOBED WOODSIA 



Woodsia obtusa 



Small, slightly downy, fronds broadly lanceolate, nearly twice-pin- 

 nate. On rocks. P. 202. 



