504. 133. Alyxoria. 5. IDIOTH ALAMEiE. Plcellaph . 
XII. 133. ALYXORIA. Acharius. Wide-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 pa- 
renchyme; centre linear, bordered on both sides, hollow, 
grooved or flat, open ; borders distant. 
1. Alyxoria notha. Spurious wide-moss. 
Crust cartilaginous, rather leprous, whitish ; apolhecia 
sessile, scattered, rather roundish or oval, irregular; centre 
flat, grows convex, hemispherical, slightly tuberculated, 
edge very small. 
Arthronia gibberulosa, Achar. Lick. 142. 
Opegrapha verrucaroides /3 and 8, Achar. Lick. 244. 
Opegrapha Lichenoides, Persoon in TJster Ann. 7,30. 
Opegrapha notha, Achar. Meth. 17 ; Lich. 252; Engl. Hot. 1S90. 
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 Us'ter 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, Achar. Meth. 18. 
Opegrapha nimbosa, Achar. Meth. 18 ; Lich. 245 ; Engl. Bot. 2346. 
On the bark of trees. 
2. Hysterina Versoonii. Persoon' s slit-moss. 
Crust tartarlike, smoothish, coherent, uneven, whitish ; 
apothecia innate, oblong; centre slitlike, growing wrinkled, 
bent, plaited, irregular, slightly running into one another ; 
irregularly slightly gaping. 
