400 84. Lathag. 3. HOMOTH ALAMEiE. FI. cell. aph. 
2. Lathagrium flaccidum . Flaccid lathagrium. 
Thallus leaflike, membranaceous, smooth, blackish green; 
loles separate, reverse ovate, bluntly divided, not jagged, 
weak, flexible; apothecia scattered, few, rather flat, reddish ; 
edge thin, not cut. 
Lichen nigrescens, Ehrh. PI. Cr. 10,98. 
Lichen rupestris, Swartz Meth. Muse. 37. 
Lichen flaccidum, Achar. N. A. Stockh. 16, 14. 
Parmelia liaccida, Achar. Metli. Lich. 229 . 
Collema flaccidum, Achar. Lich . Univ. 647. 
Among mosses on rocks exposed to the drip of water. 
3. Ijathagrium furvum . Dusky lathagrium . 
Thallus leaflike, membranaceous, rather wrinkled, folded, 
blackish green, granular on both sides ; loles rounded 
irregularly, frequently wavey-crisped, not cut; apothecia 
scattered, flat, blackish brown, edge not cut. 
Lichen granulosus, FI. Ban. 462. 
Lichen furvus, Achar. N. A. Stockh. 22, 164. 
Parmelia furva, Achar. Meth. Lich. 230. 
Collema granulosum, Hoffm. FI. Germ. 99. 
Collema furvum, Achar. Lich. Univ. 650. 
On the bark of old trees, rocks, walls, and wooden roofs. 
4. Lathagrium sinuatum. Jagged lathagrium . 
Thallus leaflike, membranaceous, tiledlike, congregated, 
naked, black; loles deeply jagged, crisp, toothed; apothecia 
scattered, sessile, colour of the thallus, edge not cut. 
Lichenoides tenue crispum, foliis parvis depressis, Billen. Muse. 145. 
Lichen sinuatus, Huds. FI. Angl. 509? Engl. Bot. 772. 
Collema sinuatum, Hoffm. FI. Germ. Add. 
Parmelia scotina sinuata, Achar. Meth. Lich. 257. 
Collema scotinum sinuatum, Achar. Lich. Univ. 652. 
Among grass and moss on the ground. 
VI. 85. LEPTOGIUM. Acharus. Leplogium. 
Thallus leaflike; lobes rounded, membranaceous, very 
tender, naked, greyish green, nearly transparent; apothecia 
on very short pedicells. 
1. Leptogium tremelloides. Tremella leplogium. 
Thallus leaflike, membranaceous, very tender, nearly 
transparent, lead colour, slightly wrinkled and hollow dot- 
ted ; loles oblong, rounded, cut, smooth-edged ; apothecia 
scattered, with short pedicells, flat, reddish brown, after- 
wards black, edge pale. 
