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Ptc€ll.aph. 5. IDIOTHALAMEiE. 132. Graphis. 503
4. Qraphis letulina. Birch trait-moss.
Crust very thin, white, bordered, with black; apothecia
sunk, nearly simple, elliptic, long or starlike ; centre broad,
flat, rather hoary ; thalloid border raised membranaceous.
Opegrapha betulina, Persoon in Ust. Ann. 7, 31 ; Engl. Bot. 2281 ;
Achar. Meth. 20.
Graphis betulina, Achar. Lich. 268.
On the bark of birch-trees.
5. Graphis dendritica. Shrublike irait-moss.
Crust rather cartilaginous, uneven, very white ; apothecia
sunk, wavy, branched, black ; branches diverging, forked,
pointed; centre broad, flat, naked; border of the perithecium
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 1 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; apothecia
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 perlthecium
grooved lengthways.
Opegrapha elegans, Engl. Bot. 1832.
Graphis elegans, Achar. Syn. 85.
On the smooth bark of young trees.