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1.
Pleopsidium (Acarospora) chlorophanum [Greek, visibly
green]. |
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Thallus
marginally lobed; apothecia somewhat paler. Makes great
chartreuse-green splashes on vertical cliffs and boulders. Can be
seen from miles away. Why does it only grow on vertical surfaces?
The name Acarospora is derived from Acarinae, ticks, because the
spores in this genus are produced in great numbers in a single
ascus, and are minute, about 3-4 micro-millimeters. |
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2.
Candelariella rosulans [making small rosettes]. |
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Most
crustose yellow lichens belong to Candelariella. This one,
common through the southwest, has a distinctly clumped (rosulate)
thallus. All visible parts are the same shade of egg yolk yellow.
Most grow on rocks, but a few occur on bark and dead wood. This
species was first described from Flagstaff Mountain, Boulder,
Colorado. Another species (C. spraguei) grows on seepage
lines on rocks, and has a brighter chrome yellow
thallus. |
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