LICHALP

Physconia grisea (Lam.) Poelt subsp. grisea

Syn.: Hagenia pulverulenta auct. var. pityrea (Ach.) Bagl. & Carestia, Lichen griseus Lam., Parmelia farrea Ach., Parmelia pityrea (Ach.) Ach., Parmelia pulverulenta auct. var. grisea (Lam.) Spreng., Physcia farrea (Ach.) Vain., Physcia grisea (Lam.) Zahlbr., Physcia grisea (Lam.) Zahlbr. var. pityrea (Ach.) Flagey, Physcia pityrea (Ach.) Nyl., Physconia farrea (Ach.) Poelt non sensu Poelt

Lichenised.

Substrate: bark, siliceous rocks, acidic soil (mostly on siliceous substrata)

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the subalpine belt (potential vegetation: open, taiga-like forests dominated by Larix decidua and/or Pinus cembra and Rhododendron)

Note: a mainly mild-temperate, perhaps holarctic lichen found both on bark (often on basal parts of isolated trees) and on calciferous rocks (especially calcareous sandstone, e.g. on walls); widespread throughout the Alps, with optimum below the montane belt, locally common also in urban areas.