Order: Lecanorales Family: Parmeliaceae
Species: Pseudevernia furfuracea
Photos: On Larch. Ballyvourney, Co. Cork, SW Ireland.
An ascending or pendant, strap-like thallus, the light greyish upper surface isidiate or with small lobules. The lower surface of older lobes is black.
Occurs in upland areas on siliceous rocks, acid-barked trees (e.g conifers) and fences, mainly in northern and eastern Ireland.
There are two chemical races; var. furfuracea with the medulla C-, var. ceratea, medulla C + rose-red.
Similar: Evernia prunastri. Isidia absent, under-surface whitish
Pseudevernia furfuracea. On Larch twig. February 2011