Lichenomphalia hudsoniana (H.S. Jenn.) Redhead, Lutzoni, Moncalvo & Vilgalys

Mycotaxon, 83: 38, 2002. Basionym: Hygrophorus hudsonianus H.S. Jenn. - Mem. Carnegie Mus., 3, 12: 2, 1936.
Synonyms: Botrydina viridis (Ach.) Redhead & Kuyper nom. rej.; Clitocybe hudsoniana (H.S. Jenn.) H.E. Bigelow; Coriscium viride (Ach.) Vain.; Dermatocarpon viride (Ach.) W. Mann; Endocarpon laetevirens (Borrer) Taylor; Endocarpon viride Ach.; Gerronema hudsonianum (H.S. Jenn.) Singer; Lenormandia laetevirens (Borrer) Nyl.; Lenormandia viridis (Ach.) Arnold; Normandina laetevirens (Borrer) Nyl.; Normandina viridis (Ach.) Nyl.; Omphalia luteolilacina J. Favre; Omphalina coriscium Gams; Omphalina hudsoniana (H.S. Jenn.) H.E. Bigelow; Omphalina luteolilacina (J. Favre) D.M. Hend.; Phytoconis hudsoniana (H.S. Jenn.) Redhead & Kuyper; Phytoconis viridis (Ach.) Redhead & Kuyper; Verrucaria laetevirens Borrer non Massee nec (Wedd.) Zschacke
Distribution: N - Frl (Tretiach & Hafellner 2000), Ven (Pistocchi & al. 2026), TAA (Roux & Triebel 1994, Caniglia & al. 2002, De Marco & al. 2003, Nascimbene & al. 2008c, 2022, Onofri & al. 2013), Lomb (Nascimbene 2006), Piem, VA (Piervittori & Isocrono 1999). C - Tosc (Benesperi & al. 2007).
Description: Thallus squamulose, of contiguous to imbricate, cochleate, glaucous green to yellowish green (bright green when wet), rounded to kidney-shaped, entire or slightly lobed, to 3(-5) mm wide squamules with whitish, inrolled margins, attached by a loose network of hyphae; lower surface whitish. Upper cortex paraplectenchymatous, several layers of cells thick, uneven in thickness, the algal cells distributed through the medulla in clumps; lower cortex thin. Clamp connections absent in all hyphae. Basidiocarps not lichenized, cream-coloured to apricot-yellow, sometimes fading to white, with a 10-15 mm wide, more or less convex, marginally striate cap with concolorous, weakly decurrent lamellae, and a 1-3 cm high, 2-3 mm thick, at first pale violet, then whitish, often finely pubescent (especially in upper part) stipe. Pileipellis of hyaline, branched, 3-10 µm thick hyphae, thr pigment intraparietal, diffuse, but never encrusting. Basidia clavate, with 4 sterigmata, 35-45 x 7-10 µm. Basidiospores 1-celled, hyaline, subpyriform to narrowly cylindrical, (6-)9-11.5 x (3-)4-5. µm, thin-walled, with a prominent apiculus. Photobiont chlorococcoid (Coccomyxa). Spot tests: all negative. Chemistry: thallus without lichen substances.
Note: an arctic- boreal, temperate-montane/alpine basidiolichen,  outside the main distribution area also recorded from the Himalayas and the high mountains of South Africa, growing on wet mosses and peaty soil, more rarely also on rotting wood in siliceous areas, mostly near and above treeline. In the Alps the species is fairly common in suitable habitats over acidic soils (including raw humus in N exposition under Pinus mugo stands in limestone mountains)
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: extremely rare
Subalpine belt: very 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 DOLICHENS

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5201)
2002/07/11
lichenized thallus (''Coriscium viride'')



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (25000)
2002/07/11
lichenized thallus (''Coriscium viride''). Fresh specimen



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5201)
2002/07/11
lichenized thallus (''Coriscium viride''). Old herbarium specimen



Felix Schumm - CC BY-SA4.0
[20907], Austria, Steiermark, Eastern Alps, Noric Alps, Seetal Alps, 10.8 km SW of the centre of Judenburg, 350 m SE of Winterleitenhütte, path to Sabathyhütte, 47°05'31'' N, 14°34'25'' E, on bryophytes covering vertical faces of a siliceous rock. Leg. W. Obermayer (no 13915), 2.11.2017, det. W. Obermayer. LICHENOTHECA GRAECENSIS NR. 462



Felix Schumm - CC BY-SA4.0
[20907], Austria, Steiermark, Eastern Alps, Noric Alps, Seetal Alps, 10.8 km SW of the centre of Judenburg, 350 m SE of Winterleitenhütte, path to Sabathyhütte, 47°05'31'' N, 14°34'25'' E, on bryophytes covering vertical faces of a siliceous rock. Leg. W. Obermayer (no 13915), 2.11.2017, det. W. Obermayer. LICHENOTHECA GRAECENSIS NR. 462



Pier Luigi Nimis CC BY-SA 4.0
TSB 41441



Pier Luigi Nimis CC BY-SA 4.0
TSB 41441



Pier Luigi Nimis CC BY-SA 4.0
TSB 41441



Pier Luigi Nimis CC BY-SA 4.0
TSB 41441



Pier Luigi Nimis - CC BY-SA 4.0
TSB 42179



Pier Luigi Nimis - CC BY-SA 4.0
TSB 42179



Pier Luigi Nimis - CC BY-SA 4.0
TSB 44144



Pier Luigi Nimis - CC BY-SA 4.0
TSB 44144



Pier Luigi Nimis - CC BY-SA 4.0
TSB 44144



Pier Luigi Nimis - CC BY-SA 4.0
TSB 44144



Pier Luigi Nimis - CC BY-SA 4.0
TSB 44144



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37972



Pier Luigi Nimis - Department of Life Sciences, University of Trieste - CC BY-SA 4.0
TSB 37351


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_3/Lichenomphalia_hudsoniana.htm
France, Tourbière de la Barthe, alt. 1185 m - Picherande
19/8/2008


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Kleintiefental


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Kleintiefental


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Kleintiefental


Wolfgang von Brackel - CC BY-4.0
Greensland, Tugtutoq


Wolfgang von Brackel - CC BY-4.0
Greensland, Tugtutoq