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63.
Diploschistes scruposus [rough stony]. |
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Forms a
uniform grayish or whitish crust on rocks and, in the alpine
tundra, on soil. Immediately recognizable by the sunken, black,
craterlike apothecia that appear to have "spokes" along the edges.
Another species, D. bryophilus grows over the basal
squamules of Cladonia lichens in the forests. |
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64.
Glypholecia scabra [rough, scabby]. |
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A curious
lichen of cliffs in the desert canyons and plateaus. The thallus is
thick and chalky white, but what we would call the crust is
attached to the rock by a central umbilicus. It can be pried loose
by carefully inserting a penknife under the thallus. The apothecia
are brown and appear to be in groups, and their surfaces are
criss-crossed by pale bands of sterile tissue. |
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