Psora globifera (Ach.) A. Massal.

Ric. Auton. Lich. Crost.: 91, 1852. Basionym: Lecidea globifera Ach. - Meth. Lich.: 213, 1803.
Synonyms:
Distribution: N - Ven, TAA (Watson 2014), Lomb, Piem (Isocrono & al. 2004), VA (Piervittori & Isocrono 1999), Emil (Fariselli & al. 2020), Lig.
Description: Thallus squamulose, chestnut brown, rarely faintly white-pruinose, dull to shiny. Squamules (2-)3-5 mm broad, crenate, concave to flat, finely divided by small fissures, contiguous to imbricate, with up-turned wavy margins; lower surface greyish to brownish. Upper cortex 60-120 µm thick, of thick-walled hyphae; medulla white; lower cortex of mainly periclinally arranged hyphae. Apothecia lecideine, laminal, sessile, up to 1.5(-2) mm across, with a dark brown to black, strongly convex disc, and a thin, paler, soon excluded proper margin. Epithecium reddish brown, K+ red; hymenium colourless, I+ blue; paraphyses adglutinated, anastomosing; hypothecium pale reddish brown. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a tube, the sides of which stain I/KI+ deep blue, without an ocular chamber, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, thin-walled, 10-14 x 4-7 µm. Pycnidia dark, laminal, immersed. Conidia bacilliform, 6-9 x 1 µm. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances, epithecium with anthraquinones.
Note: on slightly calciferous or base-rich soil and weathered siliceous rocks in upland areas. Earlier records from Central Italy (see Nimis 1993: 581), being dubious, are not accepted here.
Growth form: Squamulose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: rather 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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Predictive model
Herbarium samples
Index Fungorum GBIF

Leif Stridvall http://www.stridvall.se/la/galleries.php



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5728)
2001/11/29



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34394)
2002/01/08



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35212)
2002/07/10


Zahlbruckner A. 1926. Lichenes (Flechten). In: Engler A. (ed.): Die natürlichen Pflanzenfamilien. 2nd ed., vol 8, W. Engelmann, Leipzig, 270 pp.



P.L. Nimis CC BY-SA 04
TSB 5728


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


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe: Germany.