Phaeorrhiza nimbosa (Fr.) H. Mayrhofer & Poelt

Phaeorrhiza nimbosa (Fr.) H. Mayrhofer & Poelt

Nova Hedwigia, 30: 785, 1979 (“1978”). Basionym: Parmelia nimbosa Fr. - Lichenogr. Eur. Ref.: 129, 1831.

Synonyms: Lecanora nimbosa (Fr.) Nyl.; Pachysporaria nimbosa (Fr.) M. Choisy; Psora nimbosa (Fr.) Hepp; Rinodina nimbosa (Fr.) Th. Fr.; Rinodina nimbosa f. nuda (Bagl. & Carestia) H. Magn.; Rinodina nimbosa f. pruinosa (Bagl. & Carestia) H. Magn.; Rinodina phaeocarpa (Sommerf.) Vain.; Squamaria nimbosa (Fr.) Boistel

Distribution: N - Frl, Ven (Nimis 1994, Caniglia & al. 1999, Nascimbene & Caniglia 2003c, Thor & Nascimbene 2007), TAA (Dupla Graec. Lich. 64: Obermayer 1999, Nascimbene 2008b, Nascimbene & al. 2022), Lomb (Obermayer 2015), Piem (Isocrono & al. 2004, 2005b, Hafellner & al. 2004), VA (HAL-19103), Lig. C - Abr (Nimis & Tretiach 1999, Gheza & al. 2021).

Description: Thallus squamulose to subcrustose-areolate in central parts, brownish to pale ochraceous yellow in shade-forms, sometimes faintly white-pruinose, thick, the squamules more or less rounded, flattened, smooth, contiguous, usually non imbricate, forming a compact crust; lower surface dark, attached by a dense mat of blackish to dark brown, 4-5 μm thick rhizohyphae. Upper cortex 30-40 μm thick, paraplectenchymatous, with a 10-20 μm thick epinecral layer; medulla rather loose, white in upper part, brown in lower part, merging with a 50-70 μm thick, brown lower cortex. Apothecia at first immersed and cryptolecanorine, then sessile and clearly lecanorine, up to 1.5 mm across, with a black, sometimes faintly pruinose disc, and a thin, smooth, persistent thalline margin. Epithecium 10-20 μm thick, reddish brown; hymenium colourless, 120-140 μm high; paraphyses 1.5-2 μm thick at base, distinctly thickened in upper part (to 3-4 μm), with a brown cap; hypothecium colourless, up to 100 μm high. Asci 8-spored, broadly clavate, with a I+ blue tholus, a broad ocular chamber, and a cylindrical to short-conical axial mass. Ascospores 1-septate, sometimes slightly constricted at septum, brown, ellipsoid, rather thin-walled except sometimes at the ends, 18-22 x 8-10 μm, Buellia-type. Pycnidia rare, globose, immersed. Conidia bacilliform, 5-6 x c. 1 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: variolaric acid, zeorin, and triterpenes.

Note: a circumpolar, arctic-alpine species found on naked earth, dead mosses and plant debris on more or less calciferous ground, often in wind-exposed situations, with optimum above treeline; common in the Alps, where it reaches the nival belt, much rarer in the Apennines.

Growth form: Crustose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: common

Subalpine belt: rather common

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (1775)
2001/11/28

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (33091)
2001/12/10

Juri Nascimbene - CC BY-SA 4.0

Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern

Juri Nascimbene - CC BY-SA 4.0

Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern

Felix Schumm - CC BY-SA4.0

[20904], Austria, Steiermark, Eastern Alps, Noric Alps, Seetal Alps, 9.4 km ENE of the centre of Neumarkt, ridge between Wenzelalpe and Kreiskogel, 47°05'45'' N, 14°32'50'' E, 2100 m, on lime rich soil. leg. J. Hafellner (no 75983), 1.8.2010, det. J. Hafellner. LICHENOTHECA GRAECENSIS NR. 470

Felix Schumm - CC BY-SA4.0

[20904], Austria, Steiermark, Eastern Alps, Noric Alps, Seetal Alps, 9.4 km ENE of the centre of Neumarkt, ridge between Wenzelalpe and Kreiskogel, 47°05'45'' N, 14°32'50'' E, 2100 m, on lime rich soil. leg. J. Hafellner (no 75983), 1.8.2010, det. J. Hafellner. LICHENOTHECA GRAECENSIS NR. 470

Felix Schumm - CC BY-SA4.0

[20904], Austria, Steiermark, Eastern Alps, Noric Alps, Seetal Alps, 9.4 km ENE of the centre of Neumarkt, ridge between Wenzelalpe and Kreiskogel, 47°05'45'' N, 14°32'50'' E, 2100 m, on lime rich soil. leg. J. Hafellner (no 75983), 1.8.2010, det. J. Hafellner. LICHENOTHECA GRAECENSIS NR. 470

Pier Luigi Nimis CC BY-SA 4.0

TSB 42484

P.L. Nimis CC BY-SA 04

TSB 42484

P.L. Nimis CC BY-SA 04

TSB 42484

P.L. Nimis CC BY-SA 04

TSB 42484

P.L. Nimis CC BY-SA 04

TSB 43775

P.L. Nimis CC BY-SA 04

TSB 42484

P.L. Nimis CC BY-SA 04

TSB 42484

P.L. Nimis CC BY-SA 04

TSB 43775

P.L. Nimis CC BY-SA 04

TSB 43775

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Phaeorrhiza_nimbosa.htm

France, 21/11/2014 - Mont Cenis - Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Phaeorrhiza_nimbosa.htm

France, 21/11/2014 - Mont Cenis - Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Phaeorrhiza_nimbosa.htm

France, 21/11/2014 - Mont Cenis - Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_3/Phaeorrhiza_nimbosa.htm

France, 21/11/2014 - Mont Cenis - Savoie

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