LICHALP

Toninia tristis (Th. Fr.) Th. Fr. subsp. tristis

Syn.: Psora tabacina DC. var. tristis Th. Fr., Toninia tabacina auct. non (DC.) Flagey

Lichenised.

Substrate: calciferous rocks, calciferous soil

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the alpine belt (potential vegetation: treeless Alpine grasslands and tundras, to the lower limit of perennial snow and the equilibrium line of glaciers)

Note: in fine crevices of calciferous rocks, with optimum near and above treeline. Here we have placed also all records of T. tristis without specification of the subspecies.