PL cell. aph. 5. IDIOTHALAMEiE. 132. Graphis. 503 
4. Graphis betulina . Birch trait-moss* 
Crust very thin, white, bordered, with black; apothecia 
sunk, nearly simple, elliptic, long or starlike; centre broad, 
Hat, rather hoary ; thalloid border raised membranaceous. 
Opegrapha betulina, Persoon in Ust. Ann. 7, 31 j Engl. Dot. 2281 ; 
Achar. Meth. 20. 
Graphis betulina, Achar. Lich. 268. 
On the bark of birch-trees. 
5. Graphis dendritica. Shrublike trait-moss . 
Crust rather cartilaginous, uneven, very white ; apothecia 
sunk, wavy, branched, black ; branches diverging, forked, 
pointed; centre broad, flat, naked; border of the perithe- 
cium scarcely any, thalloid border very slight. 
Opegrapha dendritica, Achar. Meth. 31 ; Engl. Bot. 1756. 
Graphis dendritica, Achar. Lich. 271. 
On the bark of trees. 
Apothecia when moistened becomes transparent, brownish. 
6. Graphis serpentina . Serpentine trait-moss . 
Crust cartilaginous, membranaceous, uneven, wrinkled, 
regular, white and grey ; apothecia sunk, long, crowded, 
bent, sometimes branched, blunt, grey-hoary ; centre 
grows flat; thalloid border thick. 
Opegrapha serpentina, Achar. Meth. 29* Engl. Bot. 1755. 
Graphis serpentina, Achar. Lich, 269. 
On the bark of trees. 
Habit singular, and quite distinct from G. pulverulenta. 
7. Graphis Lyelli . Ly ell's trait-moss. 
Crust membranaceous, smooth, pale olive-colour; apo- 
thecia crowded, seldom branched, curved, swollen, blunt; 
centre broad, convex, grey-hoary; thalloid border thick, 
white, powdery. 
Opegrapha Lyelli, Engl. Bot. 1876. 
Graphis Lyelli, Achar. Syn. 85. 
On rugged barks of trees. 
8. Graphis elegans. Elegant trait-moss. 
Crust round, granular, bald, white ; apothecia sunk, scat- 
tered, short, straight, seldom branched ; edge of the peri- 
thecium grooved lengthways. 
Opegrapha elegans, Engl. Bot. 1852. 
Graphis elegans, Achar. Syn. 85. 
On the smooth bark of young trees. 
