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506 134.Hysterina. 5.IDI0THALAME-E. Pl.cell.aph.
6. Hysterina herpetica. Emption slit-moss.
Crust nearly membranaceous, very finely cracked and
wrinkled, rather rough, grey-brown ; apothecia very small,
innate in the crust, crowded, convex, elliptically oblong,
rather long, straight ; centre slitlike.
Opegrapha herpetica, Achar. Meth. 25 ;
Opegrapha rubella decolorata, Achar. Meth. 21 ;
Lick. 248.
Lich. 24S.
Opegrapha fuliginosa, Persoon in Act. TVetteraw, 2,44.
Opegrapha rimalis fuscata, Achar. Lich. 261.
On the trunks of trees.
7. Hysterina disparata. Unlike slit-moss.
Crust membranaceous, rather smooth, pale olive, or
brownish with a green or red cast ; apothecia various, round-
ish, oblong, longish, straight or crooked; centre slitlike.
Opegrapha rubella, Persoon in Uiter Ann, 7, 31.
Opegrapha aenea, Persoon in TJster Ann. T, 31.
Opegrapha viridis, Persoon in Uster Ann. 7,31.
Opegrapha rubella a and S, Achar. Meth. 21 , 22.
Opegrapha siderella aenea, Achar. Meth. 26.
Opegrapha rubella a, y and 5, Achar. Lich. 249, 250.
On the bark of trees.
8. Hysterina vulgata. Common slit-moss.
Crust cartilaginous, membranaceous, broken, rather
scaly, smoothish, greenish-white; apothecia sessile, variously
formed, long, cylindrical, wavy, rather shining; centre
slitlike.
Opegrapha vulgata, Achar. Meth. 20 ; Lich. 250; Engl. Bot. 255, 18II.
On the clefts of old trees, especially fir-trees.
9. Hysterina epipasta. Sprinkled slit-moss.
Crust very thin, rather irregular, smooth, grey; apothecia
innate, slightly raised, very small, convex, wrinkled, opake,
various; the smaller apothecia dotlike; the longer extremely
narrow, crooked, sometimes branched ; centre and
edges very slender, scarcely any.
Opegrapha dispersa, Schrad. Krypt, 167.
Opegrapha epipasta, Achar. Meth. 26; Lich. 258 ; Engl. Bot. 1828.
On smooth bark of trees, particularly maple and horse
chestnut-trees.
10. Hysterina microscopica. Microscopic slit-moss.
Crust very thin, rather shining, pale olive; apothecia
rather elliptic, not branched, nearly parallel, growing star-
like, branched and angular ; border very slight.