Order: Peltigerales Family: Pannariaceae
Species: Parmeliella parvula
Photos: Killarney National Park, Co. Kerry, SW Ireland.
Identified by John Douglass
Variable. Small bluish-grey or olive-fawn, flat or crenulate squamules, 1-2mm long. Scattered or forming small patches or a +/- continuous crust. Marginal, coarsely granular, bluish isidia can spread to cover thallus. Apothecia very rare, reddish-brown with paler margins.
Found on mossy rocks and deciduous trees in sheltered, moist, western woodlands. Chemical reactions absent.
Similar: Fuscopannaria mediterranea. Rare. Blue-mauve soralia.
Parmeliella parvula November 2009