Day 159: What urged me to walk back to the site of yesterday's froggy encounter was this specimen of Lettuce Lung (Lobaria pulmonaria) on which the seldom-seen brown apothecia (fruiting bodies) were clearly apparent. Although the lichen is abundant in this area, I observed apothecia only on this one example. Lettuce Lung prefers old-growth forest and is sensitive to atmospheric pollutants, so if you happen to find yourself where it grows, you may be assured that you're breathing clean air.
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