Alectoria ochroleuca (Hoffm.) A. Massal.

Alectoria ochroleuca (Hoffm.) A. Massal.

Sched. Crit., 2: 47, 1856. Basionym: Usnea ochroleuca Hoffm. - Descr. Adumbr. Pl. Crypt. Lich., 2, 1: 7 1794.

Synonyms: Alectoria ochroleuca var. rigida (Fr.) Th. Fr.; Alectoria rigida (Fr.) Dalla Torre & Sarnth.; Alectoria variegata (Samp.) Tav.; Bryopogon ochroleucus (Hoffm.) Link; Cornicularia ochroleuca (Hoffm.) DC.

Distribution: N - Frl (Tretiach & Hafellner 2000), Ven (Nimis 1994, Nascimbene & Caniglia 1997, Caniglia & al. 1999), TAA (Caniglia & al. 2002, Nascimbene 2001b, 2008b, Lang 2009, Watson 2014, Nascimbene & al. 2022), Lomb, Piem (Isocrono & al. 2004, Morisi 2005), VA (Piervittori & Isocrono 1997, 1999, Piervittori & al. 2004), Emil (Fariselli & al. 2020).

Description: Thallus fruticose, more or less filamentous and shrubby, greenish grey to yellowish green, the apices concolour or blackened, matt. Branches to 13 cm long 1-2(-3) mm thick, stiff, elongate, prostrate to ascending, sparingly anisotomic-dichotomously divided, the apices sometimes drooping. Pseudocyphellae numerous, linear, raised, longitudinally oriented, to c. 1 mm long. Medulla white, compact. Apothecia extremely rare (not seen in Italian material), lecanorine. Epithecium brown; hymenium and hypothecium colourless. Asci 2-4-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-celled, broadly ellipsoid, pigmented when old. Pycnidia dark, semi-immersed, mainly apical. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: K-, C-, KC+ pale yellow, P-, UV-; medulla K-, C-, KC-, P-, UV-;. Chemistry: cortex with usnic acid, medulla with diffractaic acid.

Note: an arctic-alpine, circumpolar species found on windy ridges in moss-lichens heaths, more frequent on siliceous substrata, but sometimes also occurring in areas with dolomite, with optimum above treeline. Restricted to the Alps and the northern Apennines in Italy.

Growth form: Fruticose filamentous

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by thallus fragmentation

Commonnes-rarity: (info)

Alpine belt: rather common

Subalpine belt: very rare

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

Felix Schumm - CC BY-SA 4.0

[18142], Peru, Junin, zwischen Satipo und Huancayo, zwischen Moosen und Zwergsträuchern über Granit, 3500 m. Leg. K. Kalb, 26.07.1979. KALB: LICHENES NEOTROPICI 161.

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

Herbarium: TSB (8714)
2001/11/21
detail of pseudocyphellae

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

Felix Schumm - CC BY-SA 4.0

[18142], Peru, Junin, zwischen Satipo und Huancayo, zwischen Moosen und Zwergsträuchern über Granit, 3500 m. Leg. K. Kalb, 26.07.1979. KALB: LICHENES NEOTROPICI 161.

Felix Schumm - CC BY-SA 4.0

[18142], Peru, Junin, zwischen Satipo und Huancayo, zwischen Moosen und Zwergsträuchern über Granit, 3500 m. Leg. K. Kalb, 26.07.1979. KALB: LICHENES NEOTROPICI 161.

Curtis Randall Björk, - CC BY-SA 4.0

Nunavut, Northwest Territories, CanadaIsland, British Columbia, Canada
2012

Juri Nascimbene - CC BY-SA 4.0

Italy, Trentino-Alto Adige, Bolzano/Bozen, Val Mazia
2017

Jennifer Fiorentino

Iceland, Eastern Iceland

Zahlbruckner A. 1926. Lichenes (Flechten). In: Engler A. (ed.): Die natürlichen Pflanzenfamilien. 2nd ed., vol 8, W. Engelmann, Leipzig, 270 pp.

Zahlbruckner A. 1926. Lichenes (Flechten). In: Engler A. (ed.): Die natürlichen Pflanzenfamilien. 2nd ed., vol 8, W. Engelmann, Leipzig, 270 pp.

Pier Luigi Nimis - CC BY-SA 4.0

TSB 43985

Pier Luigi Nimis - CC BY-SA 4.0

TSB 43985

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

TSB 36865

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

TSB 36911

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

TSB 36911

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/

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/

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

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