LICHALP

Verrucaria furfuracea (B. de Lesd.) Breuss

Syn.: Verrucaria macrostoma DC. f. furfuracea B. de Lesd., Verrucaria macrostoma DC. var. imbricum Garov., Verrucaria tectorum auct. p.p.

Lichenised.

Substrate: calciferous rocks

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the submediterranean/colline belt (potential vegetation: mixed deciduous forests dominated by Quercus and Carpinus)

Note: mainly on man-made substrata, including mortar walls, on steeply inclined faces; frequently confused with V. tectorum, which is isidiate and not sorediate, and has a thinner thallus (see Roux et coll. 2014); certainly more widespread in the Alps, at low elevations.