20 
CRYPTOGAMIA. ALGiE. Lichen. 
Saucers very minute, deeply hollowed, like the cup of a Peziza. On half 
decayed oak bark, Mr. Griffith, who first discovered it, and favoured me 
with specimens. He has lately met with it on calcareous sand stone, the 
saucers considerably raised above the crust. 
(Trtcoloured Lichen. E.) Garreg-wen rocks, near Garn. Also on the 
bark of birch trees, when the saucers are whiter. 
(Z. marmoreus . E. Bot. Lecidea mdrmorea. Achar. Hook. Purt. which 
latter author may possibly be right in conjecturing this to be the same as 
our preceding species. E.) 
L. tarta'reus. Saucers yellow, with a white border; crust whitish. 
E. Bot. 156— Dill. 18. 13 — Jacq. Coll. iv. 8. 2. 
Substance tough, not gritty ; acrid. Crust thickish, wide spreading, greatly 
wrinkled, reticulated underneath, growing on other decayed mosses. 
Saucers large, deeply concave, borders sometimes scolloped. Dill. It 
assumes various appearances. Sometimes has a thinner and more uniform 
crust than usual, thickly covered with white tubercle-like excrescences, 
and free from shields except in the centre, where they are so thickly 
crowded as to be confluent. Sometimes it grows on moss, the branches 
of which are surrounded with it exactly like the incrustations formed by 
* springs abounding in a calcareous earth running over a bed of moss. Mr. 
Woodward. Crust sometimes with a greenish cast. 
(Tartareous Lichen. Yellow-saucered Dyers Lichen. Corcar. Gaelic. 
Lightf. Lccanora tartarea. Achar. Hook. E.) Rocks and large stones. 
North of England, Devonshire, and Wales. Bingley, Yorkshire; Car¬ 
narvon ; Highlands and Lowlands. Stieperstone, Shropshire. Dill. Mal¬ 
vern Hills. Mr. Ballard. On schistus in Wales. Mr. Griffith. 
P. Jan.—Dec.* 
L. fusco-lu'teus. Saucers dirty yellow, flat, imperfectly bordered; 
crust whitish, granulated. 
Dicks. II. S. and Fasc. 6. 2— (E. Bot. 1007. E.) 
Crust cohering, covering mosses and other dead plants on which it grows, 
so that it has the appearance of having leaves and branches. Saucers of 
a middling size, covered with yellow meal, which being rubbed off, they 
appear black, whence their general dirty hue. Border visible by mean 
of a magnifying glass. Dicks. (Unless in fruit it cannot be distinguished 
from L. Jrig'idus. Mr. Brown. 
Brownish-yellow Lichen. Lecidea fnsco-lntea. Achar. Hook. E.) 
* It is common in Derbyshire on limestone, and incrusts most of the stones at Urswic 
Mere. It is gathered for the dyers by peasants who sell it for a penny a pound. They 
can collect 20 or 30 pounds a day. It gives a purple colour. (The same rock is not 
scraped oftener than once in five years. It is prepared for use with volatile alkali and 
alum by the manufacturers in Glasgow; and, when sold to the dyers, it appears in the 
form of a purple powder, called Cudbear , a corruption of Cuthbert, who first applied it 
in dying woollen yarn. Much is imported from Norway. Dr. Hooker states that in the 
neighbourhood of Fort Augustus, 1807, by collecting this Lichen with an iron hoop, a 
person could earn 14s. per week, selling the article at 3s. 4d. the stone of 22 lbs. The 
fructified specimens are the best. Pennant also records it as an article of commerce 
about Taymouth ; and Miss Roberts informs me that it is collected in North Wales, at 
three half pence per lb. for the London market. Several Lichens possessing somewhat 
of the same quality, (vid. L. scrobiculatus, Roccella, omphalodes, &c.) would appear to 
have occasioned some confusion in the application of the terms, Arcell, Argol, Orehal, 
Corker, or Corcar. E.) 
