Crustose, placodioid and leprose lichens found in Ireland: R-S

A-B     C     D-K     L     M-O     P-Q     R-S     T-Z
Crustose lichens form thick or thin crusts that are firmly attached and cannot be removed without part of the substratum. Placodioid lichens are crustose but lobed at the margins and leprose lichens have a powdery appearance. Please click on the images to see details and larger photographs. Glossary (opens in new window).

Rhizocarpon geographicum Rhizocarpon geographicum Rhizocarpon lavatum Rhizocarpon lavatum Rhizocarpon oederi Rhizocarpon petraeum Rhizocarpon reductum Rhizocarpon richardii Orcularia insperata, Rinodina biloculata Rinodina gennarii Rinodina olea Rinodina sophodes Sarcogyne regularis Sarcogyne regularis, wet apothecia Schaereria fuscocinerea Dendrographa decolorans, Schismatomma decolorans Snippocia nivea, Schismatomma niveum Schismatomma umbrinum Sclerococcum sphaerale Scoliciosporum chlorococcum Scoliciosporum umbrinum Scoliciosporum umbrinum Skyttea nitschkei Skyttea sp Snippocia nivea, Schismatomma niveum Solenopsora candicans Staurothele fissa Staurothele fissa Stenocybe pullatula Stenocybe septata Stigmidium marinum Stigmidium microspilum Stigmidium microspilum Synarthonia astroidestera, Arthonia astroidestera Zyzygomyces physciacearum, Syzygospora physciacearum

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Crustose, Placodioid, Leprose       Squamulose           Foliose        Cladonia    Fruticose, Filamentous    Lichenicolous
AB, C, DK, L, MO, PQ, RS, TZ AC, DF, GL, MO, PQ, RZ

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