Common Greenshield Lichen

Flavoparmelia caperata

"Flavoparmelia caperata" 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.
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

Appearance

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.
Common Greenshield Lichen - Flavoparmelia caperata Substrate: Hardwood Common greenshield lichen,Flavoparmelia caperata,Geotagged,Spring,United States,lichen

Naming

The very similar "Flavoparmelia baltimorensis" grows mainly on rock and has globose, pustular outgrowths on the upper surface of the lobes, but does not produce granular soredia.
Common Greenshield Lichen - Flavoparmelia caperata Common greenshield lichen,Eamw lichen,Fall,Flavoparmelia caperata,Geotagged,Newland head conservation park SA

Habitat

On bark of trees, but occasionally on rock.

References:

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Status: Unknown
EX EW CR EN VU NT LC
Taxonomy
KingdomFungi
DivisionAscomycota
ClassLecanoromycetes
OrderLecanorales
FamilyParmeliaceae
GenusFlavoparmelia
Species
Photographed in
Australia
United Kingdom
Netherlands
United States of America