V. CYSTOITBKIS. 
distinct and least divided British form of Bladder-fern. 
Found only hi a cave near the sea at Aberdeen, where it 
was met with in 18i6, by Dr. Dickie, to whom I am in- 
debted for the only native specimens I have seen. It is now 
common in culti- 
vation, having been 
distributed lib e r- 
ally by Dr. Dickie, 
and is found to 
retain all its pecu- 
liarities, and to re- 
produce itself from 
,^ - <-7<_- -^ tlie s P res - 
^&^m^^> Thou h l have 
W=r-T^ placed all the above 
forms as varieties of 
C. Jr ay His, I am 
- (-*&*< vvj -i* jr 3 y v }/-, inclined to thhik C. 
^SLftf^lnTOr^ rftetetobema- 
ciently distinct to 
take rank as a spe- 
cies, and to look upon 
C. Dickieana as an 
extreme form of it. 
The species is mo- 
derately abundant 
as well as widely 
distributed through- 
out the United 
Kingdoms, growing 
hi the fissures of 
rocks and walls, in 
moist and mount- 
ainous districts 
showing a prefer- 
ence for limestone, 
and generally finest 
[Cystopteris Dickieana.] ^ the vicinity of 
