Cladonia portentosa, also known as reindeer lichen or the cream cup lichen, is a light-coloured, fruticose, cup lichen in the family Cladoniaceae.
Cladonia fimbriata or the trumpet cup lichen is a species cup lichen belonging to the family Cladoniaceae.
Erythrotrichia is a red algae genus in the family Erythrotrichiaceae. In Iceland, E. carnea is red listed as a vulnerable species (VU).
A corticolous lichen is a lichen that grows on bark. This is contrasted with lignicolous lichen, which grows on wood that has had the bark stripped from it, and saxicolous lichen, which grows on rock.
Atrichum angustatum is a species of mosses belonging to the family Polytrichaceae.
Battersia arctica is a species of algae belonging to the family Sphacelariaceae. In Iceland, it is listed as a critically endangered species (CR).
Gyroweisia tenuis, the Slender Stubble-moss, is a species of moss belonging to the family Pottiaceae.
Neckera crispa is a species of moss belonging to the family Neckeraceae.
Bryoria implexa is a species of horsehair lichen in the family Parmeliaceae.
Trematodon ambiguus is a species of moss belonging to the family Bruchiaceae.
Cladonia deformis, also known as the lesser sulphur cup or the lesser sulphur cup lichen, is a light-coloured, fruticose, cup lichen belonging to the family Cladoniaceae. This lichen was first described as Lichen deformis by Carl Linnaeus in 1753, and transferred to the genus Cladonia in 1796 by Georg Franz Hoffmann.
Cladonia coniocraea, commonly known as the common powderhorn or the powderhorn cup lichen, is a species of fruticose, cup lichen in the family Cladoniaceae. It was first described by Heinrich Gustav Flörke in 1821 under the name Cenomyce coniocraea, until Kurt Polycarp Joachim Sprengel reclassified it under the genus Cladonia in 1827.
Cladonia macilenta or the lipstick cup lichen is a species of cup lichen in the family Cladoniaceae.
Cladonia strepsilis or the olive cup lichen is a species of cup lichen in the family Cladoniaceae. In Iceland, where it is only found in a few locations in the Eastern Region, it is red listed as endangered (EN).
Struthiopteris fallax is a small species of fern in the family Blechnaceae. It is endemic to Iceland where it lives in close proximity to hot springs.
Stereocaulon alpinum is a species of fungus belonging to the family Stereocaulaceae. It is similar to Stereocaulon paschale but differs from it in containing cyanobacteria of the genus Nostoc while S. paschale contains cyanobacteria of the genus Stigonema, which have a darker colour than Nostoc.
Cladonia sulphurina is a species of cup lichen belonging to the family Cladoniaceae.
Cladonia homosekikaica is a species of cup lichen belonging to the family Cladoniaceae. It was formally described as a new species by Japanese lichenologist Mariko Nuno in 1975.
Bryoria pseudofuscescens is a species of lichen of the family Parmeliaceae.
Lichenopeltella cetrariicola is a species of lichenicolous fungus belonging to the class Dothideomycetes. It has been reported from Europe and Iceland but it probably has a more widespread distribution. It has been reported from at least two host species, Cetraria islandica and Cetraria aculeata.
