Lecidea alpestris Sommerf.

K. Norske Vidensk. Skrifter, 2, 2: 54, 1825.
Synonyms: Lecidea stenotera (Nyl.) Nyl.
Distribution: N - Frl, Ven, TAA, Lomb, Piem (Isocrono & al. 2004).
Description: Thallus crustose, episubstratic, whitish to ash-grey, areolate or granulose-verrucose, with convex, to 1 mm wide areoles. Apothecia lecideine, black, adnate to sessile, often confluent, 0.4-1(-1.5) mm across (to 2.5 mm when apothecia confluent), with a soon convex, pruinose disc, and an indistinct, soon excluded proper margin. Proper exciple thin, blue-green, of radiating hyphae, K-; epithecium bright blue-green, K-; hymenium colourless to weakly blue-green in upper part, 50-100 µm high, K-; paraphyses coherent, not thickened at apex; hypothecium thin, brown-orange and K+ purple-red in lower part. Asci 8-spored, distinctly thickened at the apex, with a I+ blue tholus, the outer gelatinous coat I+ pale blue, approaching the Bacidia-type. Ascospores 1-celled (rarely a few 1-septate), hyaline, narrowly ellipsoid, 13-21(-25) x 2.5-4 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a circumpolar, arctic-alpine lichen found on naked soil, mosses and plant debris over siliceous substrata, more rarely on bark, on basal parts of conifers in the subalpine belt. Systematic position and delimitation of this species are still not clear (see Printzen 1995); it might belong to Protomicarea.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rather rare
Subalpine belt: rare
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (28940)

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php . Courtesy: Anita Stridvall