Hypotrachyna revoluta (Flörke) Hale

Smithsonian Contr. Bot., 25: 60, 1975. Basionym: Parmelia revoluta Flörke - Deutsche Lich., 1: 11, 1815.
Synonyms: Imbricaria revoluta (Flörke) Flot.; Imbricaria sinuosa var. angustifolia Anzi; Imbricaria sinuosa var. latifolia Anzi
Distribution: N - VG (Castello 2002, Martellos & Castello 2004), Frl (Tretiach & Molaro 2007), Ven (Lazzarin 1997, Caniglia & al. 1999, Nascimbene 2005c, Thor & Nascimbene 2007, Nascimbene & al. 2010b, 2013b), TAA (Nascimbene & al. 2007b, Nascimbene 2014, Nascimbene & Marini 2015, Nimis & al. 2015, Trindade & al. 2021), Lomb (Bartoli & al. 1997b, Zocchi & al. 1997, Gheza 2019), Piem (Isocrono & al. 2004, Isocrono & Piervittori 2008), VA (Piervittori & Isocrono 1999), Emil (Fariselli & al. 2020), Lig (Giordani & Incerti 2008). C - Tosc, Marc, Laz (Bartoli & al. 1997, Ruisi & al. 2005, Brackel 2015). S - Camp, Cal (Puntillo 1996, Incerti & Nimis 2006), Si (Falco Scampatelli 2005).
Description: Thallus foliose, heteromerous, dorsiventral, rather loosely attached, forming 1-4(-6) cm wide (rarely wider, up to 10 cm), more or less irregular rosettes, sorediate. Lobes irregularly subdichotomously branched with rounded to angular axils, 2-6 mm wide, often imbricate, at first closely adpressed, then slightly ascending at tips, with subtruncate to rounded, often revolute apices (especially when sorediate). Upper surface grey to greenish grey, often with a brownish hue in central parts, dull, emaculate, smooth, with initially subcapitate, subterminal soralia that later coalesce, especially at the revoluted lobe tips, bearing farinose to rarely granulose, whitish to greenish soredia. Lower surface black in central parts, brown in marginal and apical parts, that of young lobes dull, with brown to black, dull, short, forked or sparingly dichotomously branched, rarely simple rhizines, which rarely can project beyond lobe margins. Upper cortex of tightly packed, anticlinally oriented hyphae, with a pored epicortex, the cell walls with isolichenan; medulla white; algal layer continuous; lower cortex brown, of anticlinally oriented hyphae. Apothecia very rare, lecanorine, subpedicellate, 2-6 mm across, with a brown disc and a sorediate thalline margin. Epithecium brownish; hymenium and hypothecium colourless. Asci 8-spored, clavate, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 10-15 × 5-9 μm. Pycnidia: laminal, immersed. Conidia 4-5 x 1 µm. Photobiont chlorococcoid. Spot tests: upper cortex K+ yellow, C-, KC-, P-; medulla K-, C+ pink, KC+ pink-red, P-, UV-. Chemistry: upper cortex with atranorin and chloroatranorin; medulla with gyrophoric acid (major), lecanoric acid (minor), and related accessory substances (hiascic, 4, 5-di-O-methylhiascic, and 5-O-methylhiascic acids).
Note: a mild-temperate lichen found on deciduous trees, exceptionally on mossy siliceous rocks in humid areas; very much declining, and absent from urban areas. The Italian material badly needs revision: several samples could belong to H. afrorevoluta (see e.g. Masson 2005).
Growth form: Foliose, broad lobed
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: extremely rare
Submediterranean belt: very rare
Padanian area: absent
Humid submediterranean belt: rather rare
Humid mediterranean belt: very rare
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

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



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12321)
2001/12/05



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12321)
2001/12/05
detail of soralia


Harry Taylor; Owner: Natural History Museum London



Felix Schumm - CC BY-SA 4.0
[9276], Spanien, Kanaren, La Gomera: Cruce de las Hayas, an der Abzweigung der Carretera del Centro nach Las Hayas, 28°08.122' N, 17°16.848 W, 1089 m, Lorbeer-Erica Wald. Leg. Schumm 12.02.2002, det. Schumm 02.2002.



Felix Schumm - CC BY-SA 4.0
[9276], Spanien, Kanaren, La Gomera: Cruce de las Hayas, an der Abzweigung der Carretera del Centro nach Las Hayas, 28°08.122' N, 17°16.848 W, 1089 m, Lorbeer-Erica Wald. Leg. Schumm 12.02.2002, det. Schumm 02.2002.



Felix Schumm - CC BY-SA 4.0
[9276], Spanien, Kanaren, La Gomera: Cruce de las Hayas, an der Abzweigung der Carretera del Centro nach Las Hayas, 28°08.122' N, 17°16.848 W, 1089 m, Lorbeer-Erica Wald. Leg. Schumm 12.02.2002, det. Schumm 02.2002.



Felix Schumm - CC BY-SA 4.0
[9276], Spanien, Kanaren, La Gomera: Cruce de las Hayas, an der Abzweigung der Carretera del Centro nach Las Hayas, 28°08.122' N, 17°16.848 W, 1089 m, Lorbeer-Erica Wald. Leg. Schumm 12.02.2002, det. Schumm 02.2002.



Felix Schumm - CC BY-SA 4.0
[9276], Spanien, Kanaren, La Gomera: Cruce de las Hayas, an der Abzweigung der Carretera del Centro nach Las Hayas, 28°08.122' N, 17°16.848 W, 1089 m, Lorbeer-Erica Wald. Leg. Schumm 12.02.2002, det. Schumm 02.2002.



Felix Schumm - CC BY-SA 4.0
[9276], Spanien, Kanaren, La Gomera: Cruce de las Hayas, an der Abzweigung der Carretera del Centro nach Las Hayas, 28°08.122' N, 17°16.848 W, 1089 m, Lorbeer-Erica Wald. Leg. Schumm 12.02.2002, det. Schumm 02.2002.



Felix Schumm – CC BY-SA 4.0
Image from: F. Schumm (2008) - Flechten Madeiras, der Kanaren und Azoren. Beck, OHG - ISBN: 978-3-00-023700-3



P.L. Nimis CC BY-SA 4.0
TSB 3758


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