Ochrolechia subviridis (Høeg) Erichsen

Verh. bot. Ver. Prov. Brandenburg, 72: 3, 1930. Basionym: Pertusaria subviridis Høeg - Nytt Mag. Naturvid., 61: 150, 1923.
Synonyms: Ochrolechia gallica Verseghy; Ochrolechia yasudae auct. non Vain.
Distribution: N - VG (Kukwa 2011), Piem (Giordani & Malaspina 2016), Emil (Nimis & al. 1996, Tretiach & al. 2008, Kukwa 2011, Fariselli & al. 2020), Lig (Kukwa 2011, Watson 2014). C - Tosc (Putortì & Loppi 1999b, Loppi & al. 2002c, Loppi & Nascimbene 2010, Kukwa 2011), Marc (Nimis & Tretiach 1999), Umb (Ravera 2000, Ravera & al. 2006), Laz (Massari & Ravera 2002, Zucconi & al. 2013), Abr, Mol (Caporale & al. 2008), Sar (Zedda & al. 2001, Zedda 2002, Kukwa 2011, Rizzi & al. 2011). S - Camp (Aprile & al. 2003b, Garofalo & al. 2010, Kukwa 2011, Brunialti & al. 2013, Ravera & Brunialti 2013, Catalano & al. 2016), Pugl (Nimis & Tretiach 1999), Bas, Cal (Puntillo 1996, Incerti & Nimis 2006, Brackel & Puntillo 2016), Si (Nimis & al. 1994).
Description: Thallus crustose, superficial, usually rather thick (c.1.5 mm), smooth to cracked-areolate or rarely tuberculate, whitish-grey or pale grey, rarely pale straw, delimited by a zoned, white to pinkish brown prothallus. Isidia of two types: a) soft isidia resembling soredia, matt and with an uneven, apparently weakly corticated surface, white to grey, b) true isidia with a shiny, corticate surface, grey or brownish-grey; the soft isidia may form groups which strongly resemble soralia. Apothecia very rare, lecanorine, to 3.5(-5) mm wide, rounded or irregular, with a flesh-coloured, flat to concave, white-pruinose disc and a more or less farinose thalline margin with small papillae or isidia. Proper exciple prominent, visible as a ring around thalline margin; hymenium colourless, up to 200 μm tall; hypothecium yellowish. Asci 4-8-spored, with thick, amyloid walls, Pertusaria-type. Ascospores 1-celled, hyaline, thin walled, (30-)42-68 x 25-35 μm. Photobiont chlorococcoid. Spot tests: K- C+red, KC+ red, P-, UV+ glaucous. Chemistry: gyrophoric acid (major). lecanoric acid (trace to minor) plus other accessory substances.
Note: a mild-temperate lichen found on old, isolated deciduous trees in humid areas; certainly more widespread, especially in northern Italy.
Growth form: Crustose
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: rare
Padanian area: absent
Humid submediterranean belt: rather rare
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:


Solar irradiation:








Altitudinal distribution:


Predictive model
Herbarium samples

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

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34828)