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Flavoparmelia caperata Flavoparmelia caperata on a small lower branch of Bigtooth Aspen (Populus grandidentata). Common greenshield lichen,Flavoparmelia caperata,Geotagged,Populus grandidentata,Spring,United States,bigtooth aspen,green lichen,lichen Click/tap to enlarge PromotedCountry intro

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''Flavoparmelia caperata'' or common greenshield lichen is a medium to large foliose lichen that has a very distinctive pale yellow green upper cortex when dry. The rounded lobes, measuring 3–8 mm wide, usually have patches of granular soredia arising from pustules. The lobes of the thallus may be smooth, but quite often have a wrinkled appearance especially in older specimens. The lower surface is black except for a brown margin; rhizomes attached to the lower surface are black and unbranched.

Similar species: Lecanorales
Species identified by Gary B
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By Gary B

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Uploaded Apr 15, 2019. Captured Apr 20, 2016 17:00 in 4408 Miller Rd, Barnum, MN 55707, USA.
  • Canon EOS DIGITAL REBEL
  • f/7.1
  • 1/1600s
  • ISO400
  • 100mm