LICHALP

Polycauliona phlogina (Ach.) Arup, Frödén & Søchting

Syn.: Caloplaca citrina (Hoffm.) Th. Fr. f. phlogina (Ach.) D. Hawksw., Caloplaca citrina (Hoffm.) Th. Fr. var. phlogina (Ach.) H. Olivier, Caloplaca phlogina (Ach.) Flagey, Parmelia citrina (Hoffm.) Ach. var. phlogina Ach., Placodium phloginum (Ach.) A.L. Sm.

Lichenised.

Substrate: bark, lignum

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: for a long time regarded as the mainly corticolous ecotype of Caloplaca citrina, but evidently different, and according to recent reconstructions of the Teloschistales phylogeny, a species of the “Xanthoria polycarpa-candelaria-group”; most epiphytic records of supposed Caloplaca citrina might belong here; rare, in Central Europe most records are historical.