Myriospora smaragdula (Wahlenb. ex Ach.) Nägeli ex Uloth

Myriospora smaragdula is the type of the genus. It is usually a white to yellowish, pale brown or yellowish-green color with flat to convex areoles up to 4 mm wide with up to 10 punctiform apothecia. It is usually not contiguous. It produces abundant norstictic acid and can be usually checked with a spot test (KOH).

The species is common in Europe and occurs in North America. It has been reported in Czech Republic from low elevations to as high as 1170 m and occurs on siliceous rock, especially copper-rich rock, in full sun or partial shade. But many old reports, especially if identified as var. lesdainii, need to be checked as they often are M. tangerina or M. myochroa.

taxonomic classification:

Ascomycota Lecanoromycetes Acarosporales Acarosporaceae Myriospora

most frequented synonyms:Acarospora smaragdula

Red List (Liška & Palice 2010):NT – near threatened
Red List (Malíček 2023):DD – data deficient

Occurrence in the Czech Republic

All records: 30, confirmed 0. One click on a selected square displays particular record(s), including their source(s).


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Distribution Timeline

Substrate type

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© Botanický ústav AV ČR, v. v. i. 2020–2024