Lasallia papulosa

Common Names: Common toadskin
Category: Lichens
Sub-category: Umbilicate

Umbilicate, monophyllus, rarely polyphyllus, up to 9 cm in diam., with abundant pustules more or less radiating from the center; margin irregular or scalloped; margin and pustules occasionally developing adventive lobes. Upper surface is gray or ashen gray, sometimes brown or covered with rusty red pruina, slightly areolate, scabrous to strongly areolate or even echinate toward the center of the thallus.

Edible Notes: No available information on edibility.
Warnings: Not known to be dangerous.