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Lecanoraceae
Lecanora jamesii Growth type crustose Chemistry: Thallus K-, C-, P-, UV+/- pale orange. Soralia K+/- weak yellow Can be locally abundant on Salix in damp woodland. Rare on wood. Small +/- circular patches of pale to mid-grey thallus, often with blackish prothallus. Translucent spots (large crystal clusters) are visible when thallus is moistened. Scattered piles of yellowish-green punctiform soralia form in centre of thallus. Apothecia usually absent. Similar: L. farinaria. On wood and worked timber, also found on Salix and Calluna stems. Thallus and soralia K+ yellow, C-, P+ weak yellow, UV- |
Lecanora jamesii