Cladonia crispata var. cetrariiformis (Delise) Vaino

    Primary thallus made of  scattered basal squamules up to 1-2 mm long, indented, upper surface grey-greenish, lower surface whitish, sometimes persisting. Secondary thallus  made of erect podetia, 3-10 cm, arranged in a small dense bushes, axils widely open, squamulose towards the base, shortly branched and spiny in upper parts, reticulate and spotted, grey-greeenish when moist and grey-brown when exposed to sun; sometimes podetia end in a narrow cup-like structure consisting of a single perforation surrounded by short spines, subsequently one of these spines may proliferate to form an additional extension, a process which may be repeated several times. Apothecia usually rare, ± corymbose on terminal spines, globose, dark brown. Subcylindrical pycnidia, brown. Photobiont : trebouxioid. C-, K-, KC-, Pd-, UV+ white. Relatively rare in our prospection area, in Calluna acid heathlands with or without trees, sometimes on dead wood.

_ Not to be confused with Cladonia furcata much more common, thinner and Pd+ red and UV-  and with Cladonia gracilis of which podetia are not perforate and with a very narrow cup and  Pd+ red. 

N.B. Taxon probably different from Cladonia crispata var. crispata, moreover the arctic and very northern taxa are probably also different from the oceanic taxa.