Irish lichens

Trapelia placodioides

Order: Agyriales       Family: Agyriaceae

Species: Trapelia placodioides

Growth type crustose, placodioid.
Photos: On rocks. Gougane Barra, Cork, SW Ireland.
Identified by John Douglass

Thallus creamy to pinkish-white, forming small patches or a continuous areolate crust. Outer margins of areoles +/- placodioid in appearance. Numerous yellowish-white or pale green soralia but apothecia are very rare.

Common on siliceous rocks, walls, mine-spoil heaps, especially in upland areas. K-, C+ red, KC-, P-, UV+ white.

Similar: Trapelia coarctata and T. glebulosa. Soralia absent.

Trapelia placodioides

Trapelia placodioides

Trapelia placodioides
Trapelia placodioides. August 2009

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