ray’s woodsia. 
137 
KAY’S WOODSIA {natural size). 
Woodsia Ilvensis, Smith, ^ Hooker, Babington. 
This is one of the rarest of our ferns : it roots in the fissures 
of rocks, in the most bleak and exposed mountainous regions : 
it has hitherto occurred to botanists in two counties in England, 
one in Wales, and one in Scotland. 
* The true Ilvensis of Linneus is figured on the opposite page, from a spe- 
cimen in Mr. Woodward’s herbarium, said to have been found in Wales; but 
as some little difficulty arose in tracing its history I prefer figuring in illustra- 
tion of Smith’s Woodsia Kwwm, specimens whose claim to be considered British 
admits of no question. 
