Lecidea sudetica Körb.

Syst. Lich. Germ.: 254, 1855.
Synonyms: Lecidea alboflava (Körb.) Arnold; Lecidea virescens Müll. Arg.; Lecidella alboflava Körb.
Distribution: N - Lomb.
Description: Thallus crustose, episubstratic, very thick (up to 1-1.5 mm), bullate-areolate, chalky white to whitish grey, slightly shiny, often delimited by a black prothallus. Areoles large (1-3 mm across), contiguous, strongly convex. Cortex with a 3-8 µm thick, colourless epinecral layer; medulla white, I+ intensely blue-violet. Apothecia lecideine, black, arising between the areoles, constricted at base, round or more frequently angular, 0.5-1.2(-2) mm across, with a flat to slightly convex, dull, usually epruinose disc, and a persistent proper margin. Proper exciple black-brown in outer part, colourless within; epithecium greenish black to brownish black, K+ bright blue-green; hymenium colourless, 45-65 µm high, I+ blue; paraphyses usually unbranched and rarely anastomosing, with swollen apical cells; hypothecium almost colourless to pale brown. Asci 8-spored, clavate, Lecidea-type. Ascospores 1-celled, hyaline, broadly ellipsoid, 10.5-12 x 5.5-6 µm. Pycnidia black, immersed. Conidia bacilliform, more or less straight. Photobiont chlorococcoid. Spot tests: thallus K+ yellow turning red (needle-like crystals), C-, KC-, P+ yellow. Chemistry: norstictic acid syndrome.
Note: a rather poorly known silicicolous species reported from several localities in the Alps, where it reaches the nival belt, and in central Europe, with optimum above treeline.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

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:

12345

Solar irradiation:

12345

Aridity:

12345

Eutrophication:

12345

Poleotolerance:

0123

Altitudinal distribution:

123456


Predictive model