British Lichens  
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Crustose lichens with perithecia





Pyrenula macrospora Pyrenula nitida Pyrenula occidentalis Pyrenula hibernica Pyrenula chlorospila Pyrenula laevigata Pyrenula acutispora Thelidium papulare Thelidium decipiens Thelopsis rubella Thelocarpon olivaceum Thelocarpon coccosporum Anisomeridium ranunculosporum Anisomeridium biforme Anisomeridium polipori Hydropunctaria amphibia Verrucaria nigrescens Wahlenbergiella mucosa Placopyrenium fuscellum Hydropunctaria maura Parabagliettoa pinguicula Verrucaria coerulea Verrucaria latericola Bagliettoa parmigera s. lat. Bagliettoa calciseda Porina aenea Porina linearis Porina borreri Porina hibernica Arthopyrenia analepta Arthopyrenia cinereopruinosa Arthopyrenia nitescens Arthopyrenia salicis Arthopyrenia platypyrenia Strigula tagananae Strigula taylorii Mycoporum lacteum Mycoporum antecellens Acrocordia conoidea Acrocordia gemmata Agonimia tristicula Agonimia globulifera Psoroglaena stigonemoides Phylloblastia inexpectata Eopyrenula grandicula Collemopsidium foveolatum Collemopsidium sublitorale Normandina acroglypta Thrombium epigaeum Polyblastia agraria