''Peltigera venosa'', commonly known as the fan lichen, is a species of foliose lichen in the family Peltigeraceae. 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 venosus''. German botanist Georg Franz Hoffmann transferred it to the genus '' Peltigera'' in 1789. ''P. venosa'' can be found in temperate and boreal regions of North America, Europe, and Asia, while occasionally being found in drier climates such as mountainous Arizona. The thallus color depends on its level of hydration: when wet, it is deep green, while when dry it is dark grey-green. The lobes that comprise the thallus are rounded to fan-shaped, and measure 10–15mm wide. The upper surface is smooth, while the lower surface is white with raised black veins. The apothecia (which are nearly always present) are round, flat, and reddish-brown.

References

venosa Lichen species Lichens of Europe Lichens described in 1753 Lichens of North America Lichens of Canada Taxa named by Carl Linnaeus Fungi without expected TNC conservation status {{Peltigerales-stub