504 133. Alyxoria. 5. IDIOTHALAMEZE. PI. cell. aph. 
XII. 133. ALYXORIA. Acharius.. _ Wide-moss. 
‘Thallus crustlike, flat, expanded, adnate, uniform ; apo- 
thecia oblong or long, senciles covered with a blacks carti- 
laginous membrane, enclosing a similar, rather solid pa- 
renchyme; centre linear, bordered on both sides, hollow, 
grooved or flat, open; borders distant. 
1. Alyxoria notha. Spurious wide-moss. 
Crusi cartilaginous, rather leprous, whitish; apothecia 
sessile, scattered, rather roundish or oval, irregular; centre 
flat, grows convex, hemispherical, slightly tuberculated, 
edge very small. 
Arthronia gibberulosa, Achar. Lich. 142. 
Opegrapha verrucaroides 6 and 8, Achar. Lich. 244, 
Opegrapha Lichenoides, Persoon in Uster Ann. 7, 30. 
Opegrapha notha, dchar. Meth. 11; Lich. 252; Engl. Bot. 1890. 
On the bark of old elms, fig, and other trees. 
2. Alyxoria diaphora. Variable wide-moss. 
Crust cartilaginous, membranaceous, dirty greyish-white; 
apothecia sessile, variable, oblong, rather long, narrow both 
ways, opake; centre flat; edges persistent, rather bent. 
Opegrapha varia, Persoon in Uster Ann. 7, 30. 
Opegrapha diaphora, Achar. Meth. 19; Lich. 254. 
Opegrapha diaphora spanista, Achar, Meth. 19; Lich. 254. 
On the trunks of trees. 
XIII. 134. HYSTERINA. Acharius. Slit-moss. 
Thallus crustlike, flat, expanded, adnate, uniform ; apo- 
thecia oblong or long, sessile, covered with a black carti- 
laginous membrane, enclosing a similar rather solid paren- 
chyme:; centre linear, very narrow, slitlike, enclosed on 
each side with a swollen, connivent border nearly close. 
1. Hysterina nimbosa. Cloudlike slit-moss. 
Crust slightly cracked, uneven, very white; apothecia 
crowded, small, oval oblong , turgid; centre closed. 
Opegrapha notha conferta, vem Meth. 18. 
Opegrapha nimbosa, Achar. Meth. 18 ; Lich, 245; Engl, Bot. 2346. 
On the bark of trees. 
2. Hysterina Persoonii. Persoon’s slit-moss. 
Crust tartarlike, smoothish, coherent, uneven, whitish ; 
apothecia imate, oblong; centre slitlike, growing wrinkled, 
bent, plaited, irregular, slightly running into one another ; 
ir regularly slightly gaping. 
