''Umbilicaria polyphylla'', commonly known as petaled rock tripe, is a widely distributed species of saxicolous lichen in the family

Umbilicariaceae The Umbilicariaceae are a family of lichenized fungi in the Ascomycota. Species of this family are known from a variety of climates, including temperate, boreal, austral, and warmer montane Montane ecosystems are found on the slopes of m ...

. It was first described by Carl Linnaeus in his 1753 work ''

Species Plantarum ' (Latin for "The Species of Plants") is a book by Carl Linnaeus, originally published in 1753, which lists every species of plant known at the time, classified into genera. It is the first work to consistently apply binomial names and was the ...

'' as ''Lichen polyphyllus''. German botanist

Johann Christian Gottlob Baumgarten Johann Christian Gottlob Baumgarten (7 April 1765 – 29 December 1843) was a German physician and botanist who was a native of Luckau in Lower Lusatia. He studied at the medical-surgical college in Dresden and at the University of Leipzig (from 1 ...

transferred it to the genus '' Umbilicaria'' in 1790. The lichen has a dark brown to black thallus that measures in diameter. The upper surface is smooth, while the lower surface is sooty black. It grows on exposed rocks, typically in arctic-alpine habitats. In Iceland, it has the conservation status of a vulnerable species (VU).Náttúrufræðistofnun Íslands celandic Institute of Natural History(1996).
Válisti 1: Plöntur.
' (in Icelandic) Reykjavík: Náttúrufræðistofnun Íslands.

References

polyphylla ''Polyphylla'' is a genus of scarab beetle includes more than 80 species distributed in North and Central America, southern and central Europe, northern Africa, and southern Asia—from Asia Minor to Japan. They typically reside in forests and ...

Lichen species Taxa named by Carl Linnaeus Lichens described in 1753 Lichens of Europe Lichens of North America Lichens of the Arctic {{Lecanoromycetes-stub