British Lichens  
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Crustose lichens:- apothecia without a thalline margin


Apothecia white, cream or pale coloured


Fellhanera bouteillei Scoliciosporum pruinosum Micarea alabastrites Bacidina arnoldiana Bacidina celtica Bacidina delicata Vezdaea cobria Vezdaea rheocarpa Vezdaea aestivalis Lecania cuprea Coenogonium pineti

Apothecia orange


Protoblastenia rupestris Protoblastenia incrustans Protoblastenia calva Coenogonium luteum Pachyphiale carneola Biatorella fossarum Gyalecta jenensis Gyalecta truncigena Petractis clausa Agyrium rufum Caloplaca ochracea Piccolia ochrophora

Apothecia red to brown


Miriquidica leucophaea Acarospora fuscata Acarospora smaragdula Acarospora nitrophila Mycobilimbia sphaeroides Micarea prasina Porocyphus kenmorensis Bacidia assulata Bacidina saxenii Biatora vernalis Sarcosagium campestre campestre Lecidoma demissum Vezdaea aestivalis Lecanora phaeostigma Sarcogyne privigna

Apothecia very dark to black


Lecanora sulphurea Fuscidea cyathoides Fuscidea lightfootii Fuscidea kochiana Fuscidea lygaea Fuscidea austera Acolium inquinans Miriquidica nigroleprosa Porpidia cinereoatra Porpidia striata Porpidia speirea Porpidia platycarpoides Porpidia flavocruenta Porpidia islandica Porpidia nadvornikiana Porpidia pachythallina Porpidia superba-sorediata Porpidia crustulata Porpidia melinodes Lecidea fuliginosa Lecidea fuscoatra Lecidea grisella Lecidea lithophila Bryobilimbia hypnorum Lecidea lapicida Lecidea turgidula Lecidea lactea Miriquidica pycnocarpa Miriquidica pycnocarpa f sorediata Bilimbia sabuletorum Bilimbia lobulata Megalaria pulverea Megalaria grossa Megalaria laureri Sarcogyne regularis Carbonea assimilis Calicium tigillare Hertelidea botryosa Mycoblastis sanguinarius Strangospora moriformis Lopadium disciforme Rhizocarpon geographicum Rhizocarpon lecanorinum Rhizocarpon eupetraeoides Rhizocarpon petraeum Rhizocarpon furfurosum Rhizocarpon reductum Rhizocarpon ridescens Rhizocarpon cinereovirens Rhizocarpon oederi Rhizocarpon gemminatum Tremolecia atrata Clauzadea monticola Clauzadea immersa Placynthium nigrum Fellhaneropsis myrtillicola Catillaria chalybeia Catillaria lenticularis Lecidella elaeochroma Lecidella stigmatea Lecidella scabra Lecidella asema Lecidella carpathica Scoliciosporum umbrinum Scoliciosporum chlorococcum Micarea melaena Micarea lignaria Micarea prasinella Micarea peliocarpa Micarea erratica Micarea denigrata Protomicarea limosa Dendrographa decolorans Buellia aethalea Buellia disciformis Buellia stellulata Buellia hyperbolica Aspicilia caesiocinerea Aspicilia calcarea Aspicilia leprosescens Aspicilia contorta Carbonea vitellinaria Polysporina subfuscescens Acarospora privigna Cresponea premnea Acarospora sinopica Amandinea punctata Amandinea lecideina Bellicidia incompta Bacidia laurocerasi Bacidia scopulicola Bacidia inundata Bacidina egenula Placynthiella icmalea Placynthiella icmalea Melaspilea ochrothalamia Pyrrhospora quernea Catolechia wahlenbergii Schaereria cinereorufa Schaereria fuscocinerea Byssoloma maderense Gomphillus calycioides Epilichen scabrosus Caloplaca obscurella Sagiolechia protuberans Kiliasia episema Jamesiella anastomosans Psilolechia clavulifera Calvitimela armeniaca Farnoldia jurana Pycnora xanthococca Frutidella caesioatra Bactrospora homalotropa Xerotrema megalospora Xerotrema quercicola Mniaecia jungermanniae Lambiella gyrizans Gyalideopsis crenulata

Apothecia 'Arthonioid'


Reichlingia anombrophila Coniocarpon cinnabarinum Arthonia vinosa Pachnolepia pruinata Diarthonis spadicea Felipes leucopellaeus Arthonia arthonioides Arthonia radiata Reichlingia zwackhii Arthonia ilicina Arthonia stellaris Arthothelium ruanum