Irish lichens
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Order: Ostropales Family: Phlyctidaceae
Species: Phlyctis argena Photos: On Lime. Bandon, Co. Cork, SW Ireland. Whitish to pale grey-green, thin or thick thallus with paler prothallus. White to greenish, fine to coarsely-granular soredia, few or abundant and covering thallus centre. Apothecia rare, discs greyish-black, pruinose with thin margins. Can cover large areas. Widespread, usually found on well-lit deciduous trees, rarely on conifers. Occasional on shaded, +/- basic rock and walls. K+ yellow turning red, C-, KC+ red, P+ orange-red, UV- Similar: Phlyctis agelaea. Soredia absent, apothecia frequent. |
Phlyctis argena December 2009