492 124. Variolar. 5. IDIOTHALAMEiE. Pl. cell, aph. 
Tkallus very bitter, like Peruvian bark, not immediately 
perceptible, but extremely permanent ; nucleus not yet 
found. 
f 3 . discoidea. Crust powdery, whitish then greyish, naked; 
soredia very crowded, then dilated, wavy, plano-concave ; 
border raised, swollen. 
Lichenoides candid uin et farinaceura, scutellis fere planis, Dillen Muse, 
131. 
Lichen discoideus, Engl. Bot. 1714. 
Variolaria discoideus, Achar. Meth. 14. 
Lichen albescens, finds. FI. Angl. 529. 
Lichen carpi nens, Light f. Scot. 809. 
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. 
Variolaria lactea, Persoon in Ust. Ann. 1 ; 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 ientilshape, covered above with a thin pow- 
dery veil. 
Lichen dealbafus, Achar. Prod. 29. 
Isidium corallinum, Achar. Meth. 138. 
Variolaria dealbata, Be Cand. FI. 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, Turner and Borrer in Engl. Bot. 2400. 
On the bark of birch and cherry trees. 
