Polyozosia torrida (Vain.) S.Y. Kondr., Lőkös & Farkas
in Kondratyuk & al., Acta Bot. Hung., 62, 1-2: 103, 2020 Basionym: . Basionym: Lecanora torrida Vain. - Ark. Bot., 8, 4: 45, 1909
Synonyms:
Distribution:
Description: Thallus crustose, episubstratic, white, sometimes distinctly areolate and forming up to 1 cm wide patches but most often reduced to small areoles around the apothecia, the areoles rather thick, usually slightly convex, very irregular in outline. Cortex c. 60 μm thick, of anticlinally arranged hyphae, filled with anticlinally arranged stripes of crystals. Apothecia lecanorine, broadly sessile to substipitate, round to irregular in outline, (0.3-)0.5-0.8(-1) mm across, with a concave to flat, rarely slightly convex, dark brown to blackish disc, the thalline margin initially raised, sometimes finally excluded, white but often bluish in inner part. Thalline exciple 80-190 μm wide, corticate, the cortex more or less uniform in thickness, 30-40 μm thick, filled with crystals insoluble in K, soluble in N; proper exciple up to 50 μm wide, colourless or bluish in outer part; epithecium brown olive, or blue-green, the greenish parts K+ intensifying, N+ red, filled with small crystals insoluble in K and N; hymenium colourless, c. 45-60(-80) μm high, with numerous colourless crystals insoluble in K and N; paraphyses simple or branched in upper part, coherent in K, the apical cells swollen, up to 6 μm wide, with a brown to bluish (near the exciple) cap; hypothecium colourless, more or less conical. Asci (4-)8-spored, elongate-clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 9-11(-13) x 4.5-6 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P- (very rarely P+ faintly orange), UV-. Chemistry: without lichen substances, or with low amounts of 2,7-dichlorlichexanthone and pannarin. Note: on more or less calcareous rocks; widespread and known from both Hemispheres, with a few records from the Eastern Alps (Austria), but probably still overlooked elsewhere. To be looked for in Italy.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
Harrie Sipman - Source: https://archive.bgbm.org/digitalimages/Aegean/Lecanora/Ln_torrida58495.jpg
Greece, Thasos
identification not certain
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
