Physciella poeltii (Frey) D. Liu & J.S. Hur

Index Fungorum, 464: 1, 2020. Basionym: Physcia poeltii Frey - Ber. Schweiz. bot. Ges., 73: 490, 1963.
Synonyms: Phaeophyscia poeltii (Frey) Nimis
Distribution: N - VG (TSB 17381), Frl (TSB 12327), Ven (Anzi Lich. Ven. 22: Moberg 1994, Lazzarin 2000), TAA (Nascimbene & al. 2007b), Lomb (Zocchi & al. 1997), Piem (Valcuvia 2002, 2002b, Piervittori 2003), VA (Piervittori & Maffei 1996, 2001, Piervittori & Isocrono 1999, Matteucci & al. 2008c, Ongaro & al. 2022). C - Tosc (Loppi & Putortì 1995b, Loppi & al. 1996b), Laz (Herb. Ravera 338), Abr (Recchia & Villa 1996), Mol (Nimis & Tretiach 1999, Caporale & al. 2008), Sar (Moberg 1994). S - Camp (Aprile & al. 2003b), Cal (Puntillo 1996), Si (Campisi & al. 2020).
Description: Thallus foliose, heteromerous, dorsiventral, narrow-lobed, closely adpressed, forming up to 3(-4) cm wide rosettes. Lobes 0.3-1.5(-2.5) mm wide, contiguous to separate, especially in the younger parts, ash-grey to whitish grey, matt, smooth to finely rugose. Lower surface cream-coloured at margin, pale brown in central parts, with mostly simple rhizines. Upper cortex paraplectenchymatous, with a distinct epinecral layer; medulla white; lower cortex prosoplectenchymatous, not well delimited from the medulla. Apothecia common, lecanorine, often crowded in central parts of thalli, sessile, to 3 mm across, with a black, epruinose disc, and an entire to weakly crenulated thalline margin, sometimes with a crown of whitish rhizines in lower part. Epithecium brown; hymenium and hypothecium colourless; paraphyses slender, simple or forked in upper part, the apical cells clavate, with a thin, dark brown cap. Asci 8-spored, clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, (16-)18-22(-28) x (6-)8-10(-13) μm, the wall thickened at apex and at septum, intermediate between the Physcia- and Pachysporaria-types. Pycnidia black, immersed. Conidia ellipsoid, 3-3.5 x 1 μm. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a temperate species found on isolated deciduous trees with nutrient-rich bark, especially in montane valleys. For further information see Moberg (1994) and especially Masson (2011), who could not confirm the presence of hyaline hairs on the upper surface, which were mentioned by several earlier authors.
Growth form: Foliose, narrow lobed
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

pH of the substrata:

12345

(info)

Solar irradiation:

12345

(info)

Aridity:

12345

(info)

Eutrophication:

12345

(info)

Poleotolerance:

0123

(info)

Altitudinal distribution:

123456

(info)


Predictive model
Herbarium samples
Index Fungorum GBIF


P.L. Nimis CC BY-SA 04
TSB 35720



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35720)
2003/01/22



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (8831)
2001/12/05



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35720)
2003/01/22


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_2/Phaeophyscia_poeltii.htm
France, session AFL 2014 - Parc du Mercantour - Alpes-de-Haute-Provence