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29.
Dimelaena (Rinodina) oreina [of mountains]. |
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One of the
most abundant crustose lichens of rock outcrops and cliffs. Its
thallus covers and colors rocks throughout mountainous areas, and
the greenish cast can be seen for miles. The apothecia are small,
black, and imbedded in the thallus surface. It is one of the most
common components of commercial "moss-rock." |
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30.
Lecanora argopholis [silver-spot]. |
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A lumpy,
yellow-green or sometimes white crust, not lobed, with apothecia
having a rim the same color as the thallus. The disk is a rich
brown color. Lecanora is a very big genus of lichens that
grow on rocks or bark, on the rotting stems of mosses, on dry wood,
or even on bone. With experience with a few species, one can get a
"feel" for the genus, although microscopic study is needed to be
sure. |
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