Lepraria neglecta (Nyl.) Erichsen
Nomenclatural data
Erichsen, in Lettau, Feddes Repert. 61: 127 (1958)
Lecidea neglecta Nyl., Not. Skällsk. Fauna Fl. Fenn. Förh. 4: 233 (1859)
As typical in the L. neglecta group, coarsely granular, hard, rarely of somewhat looser constitution; usually dark grey, sometimes light grey to almost white, mostly with bluish (“cold”) tinge, often also with rose tinge (herbarium specimens, caused by alectorialic acid). Very similar to L. caesioalba.
Four chemotypes are present in Greenland: (1) with alectorialic acid and angardianic/roccellic acid (n = 23); (2) with alectorialic acid only (n = 13); (3) with alectorialic acid, atranorin and angardianic/roccellic acid (n = 4); (4) with alectorialic acid and atranorin without fatty acids (n = 2).
The morphologically similar species to L. neglecta include L. alpina, L. borealis and L. caesioalba; they are collectively referred to as the L. neglecta group. Chemically, they all are different, e.g. porphyrilic acid and accessory dibenzofurans are diagnostic for L. alpina, atranorin and rangiformic acid for L. borealis, atranorin and fumarprotocetraric acid or stictic acid complex for L. caesioalba, and alectorialic acid for L. neglecta.
Ecology and distribution

Mostly on mosses, also on soil, sometimes overgrowing other lichens, rarely on rocks.
L. neglecta has a wide distribution in Greenland being more frequent in the Lower Arctic and absent from the north coast, similar to other members of this group.
Saag, L., Hansen, E. S., Saag, A. & Randlane, T. 2007.