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), 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, Lecanora-type. Ascospores 1-celled, broadly ellipsoid, pigmented when old. Pycnidia dark, semi-immersed, mainly apical. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: medulla K-, C-, KC- CK+ yellowish, P-, UV-; cortex KC+ yellowish. Chemistry: usnic acid in the cortex, diffractaic acid in the medulla.
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:

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5

Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

(info)

0

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Altitudinal distribution:

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5




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