Parmelia submontana

Parmelia submontana is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae. First described in 1987, it is characterised by a loosely attached, greenish-grey body (thallus) reaching diameters of 10–15 cm (4–6 in), with elongated linear lobes and distinctive powdery structures (isidia-like soredia) for reproduction. The species has a complex taxonomic history, having been independently discovered twice – first in Greece in 1832 and later in eastern Bohemia in 1951 – and was long misidentified as related species before being recognised as distinct. It differs from related species in having simple to forked rhizines—root-like holdfasts that attach it to bark—rather than the bushy, bottlebrush-like squarrose rhizines found in similar species, and its blistered rounded soralia that develop from pseudocyphellae. Though historically considered a Mediterranean and south-central European species, it has been expanding its range northward since the 1990s, particul......read more on Wikipedia.