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. 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
Description: Thallus foliose to subfruticose, loosely attached, forming irregular rosettes or dense tufts to 5 cm across. Lobes 1-5 mm wide, usualy narrower in terricolous forms, 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, simple to 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, narrowly clavate, with a small axial body and a distinct, K/I+ blue ring-structure in the rather large tholus, approaching the 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.
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
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: absent
Padanian area: absent

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Rarity

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Occurrence data
Predictive map
Model ImageCurrent prediction (1981-2010)
Model ImageFuture prediction (2071-2100) SSP 1-2.6
Model ImageFuture prediction (2071-2100) SSP 5-8.5
Predictive maps according to Francesconi et al. 2025

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


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


Pier Luigi Nimis - CC BY-SA 4.0
TSB 42452


Pier Luigi Nimis - CC BY-SA 4.0
TSB 42452


Ulrich Kirschbaum
Switzerland: Alps. 2000 m


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Frauenalpl, as Vulpicida tubulosus


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Frauenalpl, as Vulpicida tubulosus


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Frauenalpl, as Vulpicida tubulosus


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in alp. Cadubriae (Antelao) 1855
as Platysma juniperinum


Triin Aimla; Owner: University of Tartu


Triin Aimla; Owner: University of Tartu


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.