492 124.Variolar. 5. IDIOTHALAMEZ. Pi. cell. aph. 
Thallus very bitter, like Peruvian bark, not immediately 
perceptible, but extremely permanent; nucleus not yet 
found. 
8. discoidea. Crust powdery, whitish then greyish, naked ; 
soredia very crowded, then dilated, wavy, plano-concave ; 
_border raised, swollen. 
Lichenoides candidum et farinaceum, scutellis fere planis, Dillen Musc. 
131, 
Lichen discoideus, Engl. Bot. 1714. 
Variolaria discoideus, Achar, Meth. 14. 
Lichen albescens, Huds. Fl. Angl. 529. 
Lichen carpineus, Lightf. Scot. 509. 
Variolaria amara discoidea, Achar. Lich. 325. 
On the bark of trees. 
6. Variolaria lactea. Milky smallpox-moss. 
Crust tartarlike, regular, cracked in beds, smooth, milky, 
circumference slightly radiated and crenately lobed; apo- 
thecia crowded, bordered; above very white, powdery. 
Lichen lacteus, Lin, Mant. 132; Engl. Bot. 2410. f 
Variolaria lactea, Persoon in Ust. Ann. 13 Achar. Meth. 14; Lich. 321. 
On rocks and stones. 
Nucleus not yet discovered. 
7. Variolaria corallina. Coralline smallpox-moss. 
Crust tartarlike, cracked, white, frequently nipply, 
branched; apothecia hemispherical, rather depressed at 
top; nucleus lentilshape, covered above with a thin pow- 
dery veil. 
Lichen dealbatus, Achar. Prod. 29. 
Isidium corallinum, Achar. Meth. 138. 
Variolaria dealbata, De Cand. Fl. Fr. 2,525; Engl. Bot. 2519. 
Variolaria corallina, Achar. Lich. 319. 
On stones and rocks. 
Barren apothecia whiter and more convex, contain no 
nucleus. ; 
8. Variolaria griseo-virens. Greyish-green smallpox-moss. 
Crust elliptical, thin, slightly tartarlike, rugged, grey, 
scarcely limited; apothecia roundish, narrow-bordered ; 
soredia greenish. 
Variolaria griseo-virens, Zurner and Borrer in Engl. Bot. 2400. 
On the bark of birch and cherry trees. 
