CRYPTOGAMIA. ALG. Lichen. B. (2) Crustaceous, 
se | with TUBERCLES. 
= Hof: lich. 19. Qa 
Crust half a line thick, cracking into small partitions when 
dry, colour of rusty iron. Tubercles numerous, sometimes 
crowded, blue black, encompassed with a narrow margin, shining 
— wet; flat, but convex and perforated at the top when old. 
Rocks and stones in Scotland. [King’s Park, Edinburgh. 
f 
_ > erust : crust yellowish, with a tinge of brown. - 
E, bot. 485=Dicks. 2. 3.” : 
Crust growing irregularly to the bark of trees, composed of 
—— of a pale yellow. Tubercles convex, unequal, which 
m the risings of the crust sometimes seem as if immersed. 
Very much resembling a Byssus, but its fractification proves it 
to be a Lichen. (Vicks. Crust following the sinuosities of the 
bark, without any defined margin, composed of mictoscopic gra- 
nules of a dirty cream colour. ..Tubercles rather tare, minute, 
seldom so large as the smallest pin’s head ; blackish, irregular 
ly, dispersed. Mr..Woopward, =  y 
" Onthe trunks of oaks. [Frequently in patches of consider- 
able extent, seldom more than 5 or 4 feet from the ground. Mr. 
Woopwarp, Garn Dingle, Mr. Grirritu.] P. Jan.—Dec. 
L. Tubercles black, in bordered ; partly sunk in the quer’neus.. 
L. Tubercles black, not bordered, crust yellowish, with geogra’phicus 
black lines and dots resembling a map. 
E, bot, 245—Hoffm, lich. 54. 2-enum. 3. 1-Dill, 18, 5-Fl. 
dan, 472. 3. age pe Ss 
Sr ceed 
L. Tubercles brown black, very small, irregular ; crust sulphu‘reus, 
brimstone colour, cracked, uneven, 
