10 
CRYPTOGAMIA. ALGiE. Lichen. 
copic granules of a dirty cream colour. Tubercles rather rare, minute, 
seldom so large as the smallest pin’s head, blackish, irregularly dis¬ 
persed. Mr. Woodward. 
(Oak Lichen. E.) On the trunks of oaks. Frequently in patches of 
considerable extent, seldom more than three or four feet from the ground. 
Mr. Woodward. Garn Dingle, Mr. Griffith. (On old trees near New¬ 
castle, Northumberland; in Newton-Cap Wood, Bishop Auckland, and in 
woods near Egleston, Durham. Mr. Winch. E.) P. Jan.—Dec. 
L. geograpiFicus. Tubercles black, (not bordered. E.), crust yellow¬ 
ish, with black lines and dots resembling a map. 
E. Bot. 245— ( Hoffm. Lick. 54.2. E.)— Enum. 3. 1— Dill. 18. 5— FI. Dan. 
472. 3. 
Crust orange-coloured, brittle, marked with black. Tubercles or prominent 
lines of the same colour. Grows on granite and other compound stones, 
and is one of the few British vegetables that can bear the keen air of 
Skiddaw’s top. Mr. Gough. Crust very thin, irregular in shape, yellow, 
hardly separable from the stones on which it grows, marked with distinct, 
rising, black lines dividing into compartments. Tubercles black, small, 
but varying in size, not bordered. Dill. 
(Map Lichen. Lecidea atro-virens. /3 geographica. Hook. E.) Rocks in 
the north of England; Steiperstone, and Pentir in Scotland. In the 
north of England in vast patches sometimes spreading on a smooth rock 
three or four feet square. Mr. Woodward. (On Gateshead Fell, and on 
rocks at Shewing Shields; on Cheviot. Mr. Winch. E.) P. Jan.—Dec. 
L. sulphu'reus. Tubercles brown black, very small, irregular; crust 
brimstone colour, cracked, uneven. 
Hoffm. Enum. 4. 1 ; and Lich. 11. 3—( E. Bot. 1186. E.) 
Crust like tartar, unequal, thickish, raised, cracked and tesselated, pale 
sulphur colour, white at the edge when broken. Tubercles at first 
numerous cloudy spots, at length rising out of the crust, not readily 
distinguishable from it but by the blackish or dirty reddish colour. 
Hoffman. Crust and tubercles soft and almost gelatinous. 
(Sulphureous Lichen. Lecidea sulphurea. Achar. Hook. When grow¬ 
ing on wood Dr. Smith observes that the crust is thinner and more inclined 
to be mealy, and the shields paler, of a yellowish waxy brown. E. Bot. E.) 
Rocks in Scotland. Sometimes on wood, or bricks. Covers the walls 
and tiles of Catlidge House, near Newmarket. Relhan. 
L. flavo-vires'cens. Tubercles black, rough; crust green yellow, 
mealy, Dicks, iii. 
Dicks. 8. 9. 
Crust scarcely cohering, composed of farinaceous globules of a fine yellow 
with a greenish cast. Tubercles few, thinly scattered, of a middling size. 
Dicks. Fasc. iii. 13. Not L. jlavo-virescens of Gmel. Syst. Veg. 
(Yellow-green Lichen. E.) On sandy soil. 
Var. 2. Tubercles black, very minute ; crust fine yellow green, granulated. 
Specimens from the top of Garnedd Llewellin by Mr. Griffith. The tuber¬ 
cles are smaller than in Mr. Dickson’s plant, the granulations of the crust 
much larger, but equally soft and farinaceous. The colour of the crust 
varies from green to yellow green. 
L. Atro-vi'rens. Tubercles black; crust fine green ; border black. 
