description Lecanora expallens Overview
Lecanora expallens is a crustose, bark-growing lichen in the genus Lecanora. Its thallus is usually yellow-green and granular or cracked, while small yellow to lemon-colored soralia produce farinose soredia that can merge into a continuous sorediate crust. The species is recorded widely in temperate Europe and is useful to lichen observers who identify corticolous lichens by thallus color, soralia, and chemistry.
help Lecanora expallens FAQ
What kind of lichen is Lecanora expallens?
Lecanora expallens is a crustose lichen that grows on bark. Its thallus is usually yellow-green and may appear granular or cracked.
What do Lecanora expallens soralia look like?
Its soralia are small and yellow to lemon-colored. They produce farinose soredia, which can merge into a continuous sorediate crust.
Where does Lecanora expallens grow?
It is a bark-growing species found on tree surfaces. The crustose growth form means it is closely attached to its substrate rather than forming leafy lobes.
How can Lecanora expallens be recognized?
A yellow-green crust combined with yellow to lemon-colored soralia is a useful field clue. The powdery soredia may spread until much of the thallus looks like a sorediate coating.
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