62 
deus’tus. 
CRYPTOGAMIA. ALGZ®. Lichen. 1. Root central. 
nion that L. pu//us of Dickson, and L. deustus of Hudson are 
the same plant, and neither of them other than the L. torrefactus 
of Lightfoot, consisting of one leaf. Mr. Grirriru. 
L., polyrbizos. Huds. Found in the same places with Z. 
corneus. Diu. On rocks and stones. On St. Vincent’s Rocks. 
near Bristol. Hups. About Llanberris. Mr. Davies iz Fl. Angi, 
On the Highland Rocks frequent. Licutr. [On rocks in the 
mountainous parts of Dartmoor, Devonshire, rare. Mr. New- 
BERRY.] P. Jan.— Dec. 
L. Tubercles black : foliage grey brown, smooth on both 
sides. : 
Faill. 21. 14—Facg. coll, iii. 1. 3. 
So brittle, that unless when moist, it cannot be separated 
from the rocks without being torn. Livy. 
Dr. Smith thinks that the plant of Dillenius, 30. 117, is the 
_. L. polyrhizos, and that Vaillant’s figure represents the true L. 
deustus of Linneus. See.Smith’s tour. i. 104. but read Dill. 
tab. 30, instead of 20. It seems to be very like the less tiled 
and leafy specimens of the L. miniatus, except in the colour of 
the tubercles. Mr. Griffith is of opinion that the L. deustus and 
L. proboscideus are the same plant, the former with a single leaf, 
the latter either single or complicated, and has favoured me 
with the sight of an instructive set of specimens which seem 
; fully to support this idea, See his observations under L, torre. 
anthra’cinus L,, Foliage black brown, smooth on both surfaces ; edge 
Dille’nii. 
lobed, rounded. 
: Facq. mise. ii. 9. 4. a 
Root single ; central. Foliage leather-like, but thin and 
silky ; brown black, naked and smooth on both surfaces; in 
shape like a lettuce; towards the edge plaited and curled. Wut 
FEN in Jacq. misc. nt 
On rocks in Scotland, Dicks, iii. 19. 
-L. Tubercles black, small : foliage ash-coloured, bluntly 
lobed, soft, pliable, thick, underneath brown black, 
roughish, a 
Se eae 
Root single, short, like stone. Leaf circular, 1 to 12 inch © 
diameter, bluntly lobed, leather-like, thick, pliable, soft to the 
touch on the upper side, neither polished nor hairy, ash-coloured ; 
underneath more or less rough, and grey, brown or blackish. 
Tubercles small, black, a little raised above the leaf. Drut. 
This had been considered the same as the L. deustus of Lin. 
nzeus, but that species is brittle and smooth on both sides, 
