This species has a primary thallus that consists of small, incised squamules that may be slightly sorediate. The podetia are recognisable by their slender stems that open abruptly into a very regular cup that is covered in delicate, greenish, farinose soredia and lack any squamules or corticate granules.
Thallus: C-, K-, UV-
In Scotland, Cladonia fimbriata is widespread on rotting wood, humus pockets in walls, and dunes, where it is often found amongst mosses. BLS distribution map
On trunks of acid-barked trees and on fenceposts, Cladonia fimbriata is often found alongside Cladonia coniocraea.
Cladonia fimbriata is distinguished from Cladonia chlorophaea on basis of the podetia that abruptly widen into a neatly rounded cup.
scottishlichens.co.uk 