ITALIC 8.0

Candelariella plumbea Poelt & Vězda

Folia Geobot. Phytotaxon., 11: 89, 1976.

Synonyms:

Distribution: N - Frl, Ven (Nimis 1994), Piem (Clerc & al. 1999), VA (TSB 29456). C - Abr (Nimis & Tretiach 1999).

Description: Thallus (which might belong to a host lichen) crustose to subsquamulose, lead-grey to almost black in sun-forms, to 1 mm thick, firmly attached with a strongly constricted basis. Marginal squamules to 1 mm long and wide, more or less deeply divided, usually weakly convex; inner squamules smaller, some of them ascending and sometimes forming coarse, 0.1-0.25 wide isidia-like outgrowths. Cortex of hyphae running parallel to the surface, overlain by a thick epinecral layer and underlain by a paraplectenchymatous tissue. Apothecia lecanorine, immersed in the thallus, 0.5-1(-1.5) mm across, round to usually undulate, with a flat to weakly convex, yellow to ochre-yellow disc, a thick, yellow proper margin, and a grey thalline margin often visible on the flanks of young apothecia. Exciple paraplectenchymatous, in upper part inspersed with minute brownish yellow crystals; epithecium yellow, granular; hymenium colourless, c. 60 µm high; paraphyses 2-3 µm thick at the base, the terminal cells swollen and up to 5 µm thick. Asci 8-spored, clavate, with an apical dome which is I+ blue only in the internal, lower part, interrupted in the centre by an I+ paler blue strip, Candelaria-type. Ascospores 1-celled, ellipsoid, hyaline, straight or slightly curved, 13-18(-20) x 4.5-6 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K- or K+ reddish-orange, C-, KC-, P-. Chemistry: apothecia with pulvinic acid derivatives.

Note: a lichen found on nutrient-enriched, more or less calcareous rocks wetted by rain in exposed habitats, often developing along small cracks; see also note on . C. oleaginescens.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

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

Herbarium samples

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 19682