Species description:
Thallus small to medium but not minute; lobes averaging to more than 1.5 mm wide, always dorsiventral; isidia present or absent, distinctly wrinkled upper surface AND
Lobe margins naked; isidia, if present, naked (upper surface, however, occasionally hairy) AND
Lobes broad or, if elongate, then never both erect and terminating in distinctly swollen tips; lobe tips averaging to less than 0.2 mm thick when moist, seldom strongly wrinkled when dry; habitat and distribution various AND
Lower surface densely white-woolly throughout (except often naked along lobe margins) AND
Upper surface smooth or rarely in part bearing few scattered wrinkles; isidia not at all dimpled at tips; distribution various AND
Upper surface distinctly greyish (check sheltered lobes), sometimes in part covered in short whitish hairs; mature isidia cylindrical or branched/coralloid

Comments:
Specimens having minute white hairs over the upper surface can be referred to var. hirsutum (Sierk) P.M. Jørg.

Source:  Lichens of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration By:  Trevor Goward