LICHALP

Diploschistes actinostoma (Ach.) Zahlbr.

Syn.: Acrorixis actinostoma (Ach.) Trevis., Diploschistes sbarbaronis B. de Lesd., Limboria actinostoma (Ach.) A. Massal., Urceolaria actinostoma Pers ex Ach. nom. inval., Urceolaria actinostoma (Ach.) Schaer., Verrucaria actinostoma Ach.

Lichenised.

Substrate: siliceous rocks

Altitudinal range: from the mesomediterranean belt (potential vegetation: evergreen broad-leaved forests dominated by Quercus ilex) to the montane belt (potential vegetation: deciduous forests dominated by Fagus sylvatica and closed coniferous forests with Picea abies)

Note: a mild-temperate lichen found on basic siliceous substrata, including roofing tiles, more rarely on porous, weakly calciferous rocks, exceptionally also on superficially decalcified limestones; most frequent and abundant south of the Alps. The specific epithet is usually misspelled as “actinostomus”, but it is a name, not an adjective, meaning “a mouth with rays”.