Lecidea variegatula Nyl.

Flora, 48: 6, 1865
Synonyms: Lecidea microsporella Lettau
Description: Thallus crustose, episubstratic, areolate, pale yellowish brown to brown, somehow shiny, the areoles subsquamulose, weakly convex with reflexed margins, (0.2)-0.4-0.7(-1.3) mm wide, contiguous to usually scattered. Medulla white, I-. Apothecia abundant, often located at the margins of the areoles, lecideine, glossy black, circular in outline, 0.2-0.8(-1.3) mm across, with a flat disc and a very thin proper margin. Proper exciple blackish; epithecium bluish green or green; hymenium colourless or greenish in upper part, 25-37 μm high; paraphyses coherent; hypothecium colourless. Asci 8-spored, narrowly clavate, thick-walled, with a K/I+ pale blue tholus and a strongly amyloid, thin apical cushion, surrounded by a I+ blue outer layer, Lecidea-type. Ascospores 1-celled, hyaline, ellipsoid, 5-7.3(-8.5) x 2.5-3(-3.6) μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C- KC-, P-, UV-. Chemistry: without lichen substances.
Note: on low siliceous outcrops, pebbles and tiles at low elevations; widespread in Europe but rarely collected, with a single record from the Eastern Alps (Austria); to be looked for in Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

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Altitudinal distribution:


Predictive model

P.L. Nimis CC BY-SA 4.0
TSB 21837

Pier Luigi Nimis - CC BY-SA 4.0
Herbarium: TSB 21837

P.L. Nimis CC BY-SA 04
TSB 21837