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 Rinodina biloculata Rinodina gennarii Rinodina olea Rinodina sophodes Sarcogyne regularis Sarcogyne regularis, wet apothecia Schaereria fuscocinerea Schismatomma decolorans Schismatomma decolorans Schismatomma niveum Schismatomma umbrinum Sclerococcum sphaerale Scoliciosporum chlorococcum Scoliciosporum umbrinum Scoliciosporum umbrinum Skyttea nitschkei Skyttea sp Staurothele fissa Staurothele fissa Stenocybe pullatula Stenocybe septata Stigmidium marinum Stigmidium microspilum Stigmidium microspilum Syzygospora physciacearum on Physcia tenella

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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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