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11.
Caloplaca trachyphylla [rough-leaf]. |
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A beautiful
rosette-forming orange crust on sandstone, differing from
Xanthoria elegans in having a coarse, almost warty thallus
with tightly appressed, contiguous marginal lobes. Caloplaca
decipiens grows in similar sites but is more yellow in color
and differs by having masses of soredia toward the center of the
thallus. |
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12. Psora
decipiens [deceitful]. |
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A common
desert soil lichen (also occurring on tundra soils) easily
recognized by its brick red thallus and black convex apothecia. It
is a common component of soil crusts (See also Psora
icterica). These crusts take many years to form, and are
quickly destroyed by trampling, after which the loose soil can be
blown away. |
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