502 131. Endocarp. 5. IDIOTHALAMEiE. PL cell. aph. 
Lichen iluviatilis, Weber Gotting. 265. 
Lichen aquaticus, Weiss Crypt. 77 ; Engl. Bot. 594. 
Platisma aquaticum, Hoffm. Lich. 2, 64. 
Endocarpon fluviatile, Wahlenb. Lapp. 462. 
Endocarpon Weberi, Achar. Meth. 128 ; Lich. 304. 
On rocks and stones under water. 
Thallus while wet a fine green ; when dry blackish-brown 
or dark green ; underneath sometimes deep black. 
E. Ofegraphide.®. Thallus crustlike, flat, expanded, 
adnate, uniform ; apothecia sessile, flat, bordered, linear. 
XI. 132. GRAPHIS. Adanson. Trait-moss. 
Thallus crustlike, flat, expanded, adnate, uniform ; apo- 
thecia composed of a long thalamium immersed in the 
thallus; perithecium single, cartilaginous, halved, lateral, 
black, enclosing a linear nucleus on both sides; centre 
naked above and below ; inside cellular-streaked. 
1. Gr aphis scripta . Written trait-moss . 
Crust membranaceous, smooth, rather shining, whitish 
and rather greyish, nearly regular; apothecia slightly raised, 
naked, wavy, simple or branched ; centre slitlike; thalloid 
border raised, membranaceous. 
Lichenoides crusta tenuissima, peregrinis velut literis inscripta, Lillen 
in Raii Syn. 7 1, 48. 
Lichen scriptus, Lin. S. P. 1606. 
Opegrapha scripta, Achar. Meth. 30; Engl. Bot, 1813. 
Graphis scripta, Achar. Lich. 265. 
On the smooth bark of trees in woods. 
Apothecia resemble Hebrew or Chinese characters. 
2. Graphis pulverulenta . Powdery trait-moss. 
Crust spreading, membranaceous, whitish ; apothecia 
slightly raised, wavy; centre grooved, gaping, grey-hoary; 
thalloid border raised, slightly swollen. 
Opegrapha pulverulenta, Persoon in Uster Ann. 7, 29 ; Engl. Bot. 1754. 
Graphis pulverulenta, Achar. Lich. 266. 
On the bark of trees. 
3. Graphis cerasi . Cherry-tree trait-moss. 
Crust very thin, grey, greenish, shining; apothecia 
slightly raised, straight, long, simple, pointed, nearly pa- 
rallel; centre grooved, slightly hoary; thalloid border thin. 
Opegrapha cerasi, Persoon in Uster Ann. 11, 20; Engl. Bot. 2301 ; 
Achar. Meth. 27. 
Graphis cerasi, Achar. Lich. 268. 
On the bark of cherry and sloe trees* 
