Cetraria juniperina (L.) Ach.

Meth. Lich., Sectio post.: 299, 1803.. Basionym: Lichen juniperinus L. - Sp. Pl., 2: 1147, 1753, nom. cons.
Synonyms: Cetraria alvarensis (Wahlenb.) Vain.; Cetraria juniperina (L.) Ach.; Cetraria juniperina (L.) Ach. var. alvarensis (Wahlenb.) Torss.; Cetraria juniperina var. alvarensiformis Du Rietz; Cetraria juniperina var. campestris Stenh.; Cetraria juniperina var. pseudopinastri Du Rietz; Cetraria juniperina var. terrestris auct. non Schaer.; Cetraria juniperina var. tubulosa Schaer.; Cetraria tilesii auct. non Ach.; Cetraria tubulosa (Schaer.) B. de Lesd.; Tuckermannopsis juniperina (L.) Hale; Vulpicida juniperinus (L.) J.-E. Mattsson & M.J. Lai; Vulpicida tubulosus (Schaer.) J.-E.Mattsson & M.J. Lai
Distribution: N - Frl, Ven (Nascimbene & Caniglia 1997, 2003c, Caniglia & al. 1999, Giovagnoli & Tasinazzo 2014), TAA (Nascimbene & al. 2006, Nascimbene 2008b), Lomb, Piem (Isocrono & al. 2004, Matteucci & al. 2015b), VA (Borlandelli & al. 1996, Piervittori & Isocrono 1997, 1999).
Description: Thallus foliose to subfruticose, loosely attached, forming irregular rosettes or dense tufts to 5 cm across. Lobes 1-5 mm wide, dorsiventral, slightly canaliculate or terete, ascending to erect. Upper surface bright yellow in open habitats to greenish yellow in shaded habitats; lower surface pale yellow to tan or whitish, more or less veined, with pale, squarrose rhizines. Upper and lower cortex paraplectenchymatous; medulla yellow, very loose. Apothecia frequent especially in epiphytic forms, lecanorine, submarginal to almost laminal, 2-6 mm across, with a brown to brown- black disc and a smooth, yellow thalline margin. Asci 8-spored, broadly clavate, Lecanora-type. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, 5-6 x c. 5 μm. Pycnidia frequent, black, marginal to laminal, immersed or on short black projections. Conidia bottle-shaped, 6-8 x 1-2 μm. Photobiont chlorococcoid. Spot tests: cortex K-, C-, KC+ yellow, P-; medulla K-, C-, KC-, P-, UV+ blackish red. Chemistry: cortex with usnic acid; cortex and medulla with vulpinic and pinastric acids.
Note: this mainly subarctic-subalpine to boreal-montane species is found on calciferous mineral soil in dry Alpine grasslands and on wind-exposed ridges, more rarely on the twigs of shrubs. It is included as “Regionally Exctinct” in the Italian red list of epiphytic lichens (Nascimbene & al. 2013c), but this referred only to the epiphytic forms formerly treated as V. juniperinus.
Growth form: Foliose, broad lobed
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by thallus fragmentation

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: extremely 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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Poleotolerance:

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Altitudinal distribution:

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Andres Saag; Owner: University of Tartu



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5156)
2002/07/12
marginal pycnidia



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5156)
2002/07/12


Andres Saag; Owner: University of Tartu


Triin Aimla; Owner: University of Tartu


Triin Aimla; Owner: University of Tartu



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (29469)
2001/12/09


Andres Saag; Owner: University of Tartu


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



Curtis Randall Björk, - CC BY-SA 4.0
Sugarbowl-Grizzly Den Provincial Park, British Columbia, Canada
August 2017
as v. tilesii



Juri Nascimbene - CC BY-SA 4.0
Italy, Veneto, Belluno, Vette di Feltre
2016



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37443


Hillmann J. 1936. Parmeliaceae. In: Rabenhorst’s Kryptogamen-Flora von Deutschland, Österreich und der Schweiz. 2nd, IX, Die Flechten, Abt. 5, 3. Borntraeger\Leipzig, pp. 1-309.



Pier Luigi Nimis - CC BY-SA 4.0
TSB 42452



Pier Luigi Nimis - CC BY-SA 4.0
TSB 42452