[ 6 74 ] 
nion, that this is the mofs which Martin mentions, 
in his account of the Weftern Iflands of Scotland, 
under the name of corkir ; with which the inhabit- 
ants of the illand of Sky dye a fcarlet colour. They 
prepare it by drying, powdering it, and then fteeping 
it for three weeks in urine. Linnaeus queries whe- 
ther this mofs be not the fame as his lichen calcareus 
(iy) ; a fpecies fo peculiar to limeftone rocks, that 
where-ever that ftone occurs among others, it may be 
diftinguifhed at the firft view by this mofs growing 
upon it. This is a Angularity which Dr. Dillenius 
has not mentioned in his mofs : on the other hand, 
Linnaeus does not mention any tinging property in 
his. 
The perelle d' Auvergne, or orfeille de terre, of the 
French, belongs to this order of lichens, and is 
called by Dillenius (16) The crayfijh- eye -l ike liche- 
noides. It is gathered in large quantities in the pro- 
vince of Auvergne, and is ufed as orchel ; to which 
however it is greatly inferior. They prepare it with 
lime and urine ; and were acquainted with its ufe as 
a dye long before the Canary weed was known (17) 
to them ; and it is at this day in more common ufe 
than the orchel. We have it frequent with us upon 
old walls, rocks, and ftones j but it is to be had in 
larger quantities in feveral other parts of Europe. 
(15) Lichen (calcareus) leprofus Candidas tuberculis atris Spec. 
Plant. 1140. 
( 16) Lichenoides leprofum tinSlorium fcutellis lapidum Cancri figura 
Hilt. Mufc. 130. Lichenoides crttjiaceum et leprofum Jcutellare ci- 
nercum. Raii Syn. p. 70. 
(17) Tournefort’s Voyage to the Levant, Eng. edit. Lond. 
1741. in 8°, vol. I. p. 248. 
7 The 
