CRYPTOGAMIA. ALQM. Lichen. 
II 
Hoffm. Lick. 17. 4— Jacq. Coll. ii. 14. 2. 
Tubercles small., of a yellow-greenish colour, crowded, so that the whole 
surface appears of a yellowish green, bordered by a black margin. Linn. 
Crust hardly discernible on a slight inspection, inseparable, blackish, set 
with innumerable minute yellowish dots. When magnified a blackish 
wart is found attached to each of the yellow particles, and other warts 
scattered on the crust. The smallness of the granulations and the absence 
of distinct lines distinguish it from the L. geographicus. Hoffman. 
Crust very thin, truly mealy, black. Tubercles sessile, lentil-shaped, very 
small, yellowish watery green, smooth, without any rising or different 
coloured border. Jacq. Coll. ii. 186. 
(Mealy-black Lichen. Verrucaria atro-virens. Hoffm. Lecidea atro- 
virens. Achar. Hook. E.) On rocks, Yorkshire. P. Jan.—Dec. 
L. rupic'ola. Tubercles brown, border whitish; crust white. 
Hoffm,. Enum. 6. 3.— Hoffm. Lich. 22. 1 to 4. ( E. Bot. 2156. E.) 
Tubercles the same pale brown colour within and without. Crust not re¬ 
markably thin; thicker than the shell of an egg; much cracked. In a 
more advanced state approaching to decay, the tubercles become darker 
on the surface, the crust loosens, swells into large granulations and some¬ 
times changes to green. 
(White-crusted Rock Lichen. Lichen glaucoma. E. Bot. Lecanora 
glaucoma. Achar. Hook. On the summit of Rowley-hill, Staffordshire. 
E.) On limestone rocks. About Garthmeilio, abundantly; on whin- 
stone. Mr. Griffith. 
L. comfos'itus. Tubercles black brown, imbedded; nearly flat, com¬ 
pound, very irregular in shape; not bordered: crust white, tes- 
selated. 
(E. Bot. 2156. E.) 
Tubercles white within ; flatted at the top, not bordered otherwise than by 
the cracking of the crust; from three to ten or more, often crowded 
together so as to form one large irregular mass. Crust near one-tenth of 
an inch in thickness. 
(Confluent Lichen. E.) Specimen from Mr. Griffith of Garn. On 
granite. 
(Mr. Winch is of opinion (in which Mr. Griffith concurs), that this Lichen, 
as also Parmelia glaucoma, and Lichen varians, will prove to be only 
different modifications of the same species. E.) 
L. fungifor/mis. Tubercles brown, flat, on pedicles; crust grey green. 
Dill. 14. 4. 
Crust very thin, wrinkled. Dill. 
(Brown Mushroom Lichen. E.) On rocks near Bishop's Castle, Shrop¬ 
shire. Littl. Brown. 
L. hu'fus. Tubercles brown, flattish; mostly on fruit-stalks: crust 
greenish. 
Jacq. Coll. iv. 7. 3— Hoffm. Enum. 8. 4— Dill. 14. 2. 
No proper crust for its base, but numerous, small, whitish leafits, from 
whence arise grey green pedicles, supporting largish pale brown tuber¬ 
cles. Dill. 
Heaths and ditch banks. Hampstead Heath. Dill. 
A. Oct.—March* 
