Peltigera ponojensis Gyeln.

Mem. Soc. Fauna Fl. Fenn., 7: 143, 1931.
Synonyms: Peltigera plittii Gyeln.; Peltigera plittii var. macrolobata Gyeln.
Description: Thallus foliose, broad-lobed, heteromerous and dorsiventral, loosely attached, forming 8-10(-15) cm wide rosettes. Lobes flattened, contiguous, with rounded ends, up to 1 cm broad, 5-6 cm long, with up-turned, flexuose margins, the upper surface smooth, densely arachnoid-tomentose in marginal parts, often glabrescent in central parts, whitish grey when dry (often more brownish and glossy in central parts), turning blackish green when wet. Lower surface whitish, with raised, pale, 0.5-1 mm broad veins, white lenticular interstices, and 3-7(-12) mm long, pale, simple or sparingly branched rhizines. Upper cortex pseudoparenchymatous; medulla white; lower cortex absent. Apothecia frequent, at first circular and flat, finally often saddle-shaped, terminal on short lobes, dark brown but sometimes finally blackening, to 10(-15) mm long. Paraphyses simple, distinctly thickened above. Asci 8-spored, fissitunicate, the thickened apex with a K/I+ blue ring, Peltigera-type. Ascospores 3(-5)-septate, hyaline, fusiform, thin-walled, (31-)45-65(-78) x 2.5-5 µm. Pycnidia brown in upper part, pale below, immersed, up to 0.6 mm in diam. Conidia bacilliform or slightly bifusiform, simple, 4-6 x c. 1 µm. Photobiont cyanobacterial (Nostoc, the cells not in long chains). Spot tests: cortex and medulla K-, C-, KC-, P-, UV-- Chemistry: without lichen substances.
Growth form: Foliose, broad lobed
Substrata: soil, terricolous mosses, and plant debris
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: rare
Montane belt: very rare
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent

pH of the substrata:

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Poleotolerance:

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Altitudinal distribution:

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Rarity

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Source: Timdal, E. & Gjerlaug, H. C. 2023. DNA barcodes reveal unrecognized species diversity in Peltigera sect. Peltigera in Norway, including the new species P. jonii. Graphis Scripta 35 (4): 30–65. Oslo. ISSN 2002-4495 - CC BY-4.0
Norway, OLICH8224 (O L-46317). Ruler division = 1 mm


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (1258)
2003/03/03


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (2815)
2003/03/03
lower surface with rhizines


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (1258)
2003/03/03


Pier Luigi Nimis - CC BY-SA 4.0
TSB 43940


Pier Luigi Nimis - CC BY-SA 4.0
TSB 43940


Pier Luigi Nimis - CC BY-SA 4.0
TSB 43940


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Peltigera_ponojensis.htm
France, 24/12/2014 - Lans en Vercors - Servagnet - Isère


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Peltigera_ponojensis.htm
France, 24/12/2014 - Lans en Vercors - Servagnet - Isère


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Peltigera_ponojensis.htm
France, 24/12/2014 - Lans en Vercors - Servagnet - Isère


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Peltigera_ponojensis.htm
France, 24/12/2014 - Lans en Vercors - Servagnet - Isère


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Peltigera_ponojensis.htm
France, 24/12/2014 - Lans en Vercors - Servagnet - Isère


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Peltigera_ponojensis.htm
France, 24/12/2014 - Lans en Vercors - Servagnet - Isère