ITALIC 8.0

Trapeliopsis viridescens (Schrad.) Coppins & P. James

Lichenologist, 16: 263, 1984. Basionym: Lichen viridescens Schrad. in Gmelin - Syst. Nat., 2, 2: 1361, 1792.

Synonyms: Biatora sphaeroides f. viridescens (Schrad.) Rabenh.; Biatora viridescens (Schrad.) W. Mann; Biatora viridescens var. putrida (Körb.) Hazsl.; Lecidea viridescens (Schrad.) Ach.; Micarea viridescens (Schrad.) Brodo; Trapelia viridescens (Schrad.) V. Wirth

Distribution: N - TAA (Nascimbene & al. 2007b), Lomb, Piem (Isocrono & al. 2004), Emil (Nimis & al. 1996, Fariselli & al. 2020).

Description: Thallus crustose, episubstratic, minutely granular, whitish, pale grey or pale green, when young of minute areoles, but soon almost completely covered with farinose, c. 0.1 mm wide soredia, giving the thallus a subleprose appearance. Apothecia lecideine, green-black to black, usually clustered, 0.2-0.6(-1) mm across, with an often tuberculate, soon convex disc, and a soon excluded proper margin. Proper exciple poorly developed, mostly colourless, of densely entangled hyphae; epithecium brownish; hymenium colourless, I+ blue; paraphyses thin, strongly coherent, richly branched and anastomosing, only slightly swollen at tips; hypothecium colourless. sometimes with brownish, Ascospores 1-celled, hyaline, ellipsoid, (7-)9-13 x 3.5-5(-6) µm. Photobiont chlorococcoid. Spot tests: thallus K-, C+ red, KC+ red, P-. Chemistry: gyrophoric acid plus unknown substances.

Note: a mainly boreal-montane lichen found on rotting, soft lignum, sometimes overgrowing mosses, mostly in coniferous forests or in Castanea-stands.

Growth form: Crustose

Substrata: lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: rather rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 5266

P.L. Nimis CC BY-SA 4.0

TSB 38141

P.L. Nimis CC BY-SA 4.0

TSB 38141