LICHEN luridus.
Lurid Lichen.
CR YPTOGJMIA Algse.
G en, Char. Male, scattered warts. Female, smooth
shields or tubercles, in which the seeds are imbedded.
Spec. Char. Crust of roundish, imbricated, lobed,
greenish-brown leaves, pale beneath. Shields black,
slightly bordered, at length becoming convex tubercles.
Syn. Lichen luridus. Achar. Prod. 95. Dicks. Crypt,
fasc. 2. 20. With. v. 4. 28. Hull. 293. Schrad.
Spic. 92.
L. pulmonarius saxatilis viridis, foliis vix conspicuis
squamatim sibi incumbentibus, receptaculis florum
nigris. Mich. Gen. 101. t. 54. ord. 3 6 . f . 4. Dill.
Muse. 228. t. 30. ƒ. 134.
Lecidea lurida. Ach. Meth. 77.
F o r fine specimens o f this we are obliged to the Rev. Mr.
Harriman, who found them about Eggleston, Durham. The
th ick , small, imbricated, blunt-lobed leaves form a sort o f
crust, on the loose earth in rocky shady places, to which they
are attached by white fibrous roots. They are smooth, o f a
dull brown, various in darkness, and generally tinged with
green. Their edges and under side are paler; their inner substance
very white. The shields are very black, sessile, at first
fiat with a black border, b ut they become at length convex,
and the border is obliterated. I t is related to L. cceruleo-
nigricans, t. 1139, b u t distinct.
W e cannot help agreeing with Dillenius, Schrader and
Acharius, th at Mr. Dickson’s L. squamatus, Crypt, fasc. 2.
20. H. Sicc. fasc. 3 . 25. Dill. t. 3 0 . f . 135, is n o t specifically
distinct from the above.