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492 124. Variolar. 5. IDIOTHALAME^. Pl.cell.apfu
Thalhi.s very bitter, like Peruvian bark, not immediately
perceptible, but extremely permanent ; nucleus not yet
found.
|3. dlscoidea. Crust powdery, whitish then greyish, naked;
soredia very crov/ded, then dilated, wavy, plano-concave;
border raised, swollen.
Lichenoides cantlidum et farinaceum, scutellis fere planis, Dillen Muse.
131.
Lichen discoideu?, Engl. Bot. 1714.
Variolaria discoideus, Achar. Meth. 14.
Lichen albescens, Huds. Fl. Angl. 529.
Lichen carpi neiis, Light/. Scot. b09.
Variolaria ainara discoid^a, Achar. Lich. S2o.
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 ; apothecia
crowded, bordered ; above very white, powdery.
Lichen lac(eus, Lin. Mant. 132; Engl Bot. 2410.
Variolaria lactea, Persoon in Ust. Ann. 7 ; Achar. Meth. 14 ; Lich. 321.
On rocks and stones.
Nucleus not yet discovered.
7. Fariolaria corallina. Coralline smallpox-ynoss.
Crust tartarlike, cracked, white, frequently nipply,
branched; apothecia hemispherical, rather depressed at
top ; nucleus lentilshape, covered above with a thin powdery
veil.
Lichen dealbatus, Achar. Prod. 29.
Isidiuin corallinum, Achar. Meth. 138.
Variolaria dealbata, Dc Cand. FL Fr. 2,525; Engl. Z?of. S519.
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 g: iseo-virens, Turner and Borrer in Engl. Bot. 2400.
On the bark of birch and cherry trees.