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33.
Lecanora novomexicana [of New Mexico]. |
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This
Lecanora has a thick, shiny green thallus with short, convex
marginal lobes. The apothecia are pale tan in specimens from low
altitudes, but on the tundra rocks at high altitudes the apothecial
disk is pruinose (with a white dusting) and the disk, when naked,
is more blueblack. |
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34.
Omphalora arizonica [of Arizona]. |
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This might
aptly be called a potato chip lichen. On the rocky summits of the
Colorado Rocky Mountains and desert ranges of New Mexico and
Arizona this magnificent umbilicate lichen covers rocks with thalli
as large as a foot in diameter! The thallus is bright green above,
from pale brown to jet black below, and the surface is sharply
ridged. |
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