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].