Lepra aspergilla


Lepra aspergilla

(Ach.) Hafellner (2016)
Pertusaria aspergilla; Pertusaria dealbata auct.; Pertusaria dealbescens auct.
Conservation Status
BLS Number
General Description

Description from Cannon et al (2021) below.


Thallus rather thin to moderately thick, even, sometimes ± fissured or cracked-areolate; prothallus indistinct, marginal, often paler; upper surface pale or dark grey; soralia ± evenly scattered, to 1 mm diam., white,punctiform, flat or somewhat convex, rounded; isidia very rare, small, cylindrical. Apothecia unknown. Thallus C–, K+ dirty yellow-brown, KC+ yellow-red, Pd+ orange-rust red, UV– (fumarprotocetraric (major), succinprotocetraric (major) and ± protocetraric acids). 

Characterised by the small, pale, punctiform soralia and succinprotocetraric acid in concentration above or equal to fumarprotocetraric acid. The soralia in L. amara are KC+ violet and taste bitter; those in Varicellaria lactea are C+ red; L. excludens is K+ red and mild-tasting; specimens on lignum in relict Scottish pine woodlands previously referred here are L. borealis. See also L. leucosora.


On siliceous outcrops, scree and walls, mainly upland.

Distribution Map
Key to map date classes

Fairly frequent and widespread except in S.E. and C. England.


Cannon, P., Kukwa, M., Coppins, B., Fletcher, A., Sanderson, N. & Simkin, J. (2021). Pertusariales: Ochrolechiaceae, including the genera Lepra, Ochrolechia and Varicellaria. Revisions of British and Irish Lichens 5: 1-17. Link

Lichenicolous Fungi
Sclerococcum parasiticum (Dactylospora parasiticum)
Marchandiomyces corallinus