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53.
Dermatocarpon miniatum [bright red]. |
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This
umbilicate foliose lichen, when dry, has the tough texture of a
fingernail. It grows on rocks that may be sporadically irrigated.
The thallus is gray, with small black dots that actually are
perithecia although one might think they are pycnidia. The
underside is reddish brown, often somewhat wrinkled, and never with
rhizines. |
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54.
Lasallia (Umbilicaria) pustulata subsp. papulosa [with pustules;
with small papillae]. |
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A gray,
umbilicate lichen characterized by having blisters on the upper
cortex which are matched by corresponding indentations on the lower
surface. It is abundant on shaded north faces of massive outcrops
of granite in the outer foothills. The thallus is attached by a
single umbilicus, and the underside has very fine
papillae. |
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