Buellia vilis Th. Fr.

K. Svensk. Vetensk.-Akad. Handl., Ny folj. 7, 2: 44, 1867.
Synonyms: Buellia enteroleucoides (Nyl.) Arnold; Buellia modica (Nyl.) Migula; Lecidea enteroleucoides (Nyl.) Nyl.; Lecidea modica Nyl.
Distribution: N - Frl (Tretiach & Hafellner 2000), TAA (Bungartz 2004).
Description: Thallus crustose, endosubstratic to very thinly episubstratic, poorly evident, the hyphae strongly amyloid, I+ blue. Apothecia lecideine, 0.15-0.6 mm across, sessile, constricted at base, with a flat to slightly convex disc, and a thick, persistent proper margin. Proper exciple vilis-type, radially composed of textura oblita, up to 60 µm wide, the outer part brown-red to black, K-, N+ intensifying purple, the inner part colourless and strongly I+ blue; epithecium brown; hymenium colourless, without oil droplets, c. 80 µm high; hypothecium colourless, strongly amyloid. Asci 8-spored, Bacidia-type. Ascospores 1-septate, brown, broadly ellipsoid, slightly constricted at septum, 12-15 x 7.5-9 µm, Buellia-type, with a psilate to microrugulate ornamentation. Pycnidia black, sessile. Conidia bacilliform, 2.5-4 µm long. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a mainly arctic-alpine, probably circumpolar early coloniser of siliceous pebbles in windy situations and of recently eroded granitic boulders, with optimum near and above treeline; more widespread in the Alps but probably overlooked.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species

Commonnes-rarity: (info)

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


pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (24578)
2003/03/17



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (24578)
2003/03/17