ITALIC 7.0

Lecidella viridans (Flot.) Körb.

Syst. Lich. Germ.: 242, 1855. Basionym: Lecidea sabuletorum var. viridans Flot. - Flora, 11: 697-698, 1828.

Synonyms: Biatora viridans (Flot.) Hepp; Lecidea elaeochromiza (Nyl.) H. Olivier; Lecidea glomerulosa (DC.) Steud. f. elaeochromiza (Nyl.) Zahlbr.; Lecidea viridans (Flot.) Lamy; Lecidella elaeochromiza (Nyl.) M. Choisy

Distribution: N - Frl (TSB 14171), Ven, TAA (Knoph & Leuckert 2000), Lomb, Piem (Isocrono & al. 2004), Lig (Watson 2014). C - Tosc, Sar. S - Camp, Si (Grillo 1998, Grillo & Caniglia 2004).

Description: Thallus crustose, episubstratic, granulose or minutely verrucose, 0.1-0.3 mm thick, yellowish white to greenish yellow, rarely delimited by a dark prothallus. Cortex up to 25 µm thick, patchily overlain by an epinecral layer, sometimes strongly filled with crystals; medulla white I-. Apothecia lecideine, black, sessile and constricted at base, 0.2-0.4(-0.5) mm across, with a flat to finally convex, epruinose disc, and a thin, often grey-green-pruinose, finally often excluded proper margin. Proper exciple thin (up to 75 µm thick laterally), brown to grey-green in outer part, colourless to very pale brown within, without crystals; epithecium grey-green, olive-green or brown, with granular crystals dissolving in K, 5-10 µm high; hymenium colourless, not inspersed with oil droplets, 50-65 µm high; paraphyses easily made free in K, simple, rarely branched and anastomosing, 1,5-2 µm thick at mid-level, the apical cells up to 4.5 µm wide; hypothecium colourless to very pale brown in old apothecia, not filled with crystals, K-. Asci 8-spored, clavate, with an intensely K/I+ blue tholus penetrated by a faintly amyloid, broadly cylindrical axial mass, and a poorly developed ocular chamber, the wall K/I-, surrounded by a K/I+ blue outer layer, approaching the Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 9-13 x 5-7 µm, thick-walled. Photobiont chlorococcoid. Spot tests: K-, C+ orange, KC+ orange, P-. Chemistry: 4,5-dichloronorlichexanthone, arthothelin, isoarthothelin, and thiophanic acid, plus traces of thuringione.

Note: on base-rich or slightly calciferous siliceous rocks, especially on steeply inclined faces, in dry-warm areas.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: absent

Dry mediterranean belt: extremely rare

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

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 25669

P.L. Nimis CC BY-SA 4.0

TSB 25669

P.L. Nimis CC BY-SA 4.0

TSB 14171

P.L. Nimis CC BY-SA 4.0

TSB 14171