ITALIC 7.0

Verrucaria floerkeana Dalla Torre & Sarnth.

Die Flecht. Tirol: 524, 1902.

Synonyms:

Distribution: N - TAA, Lig (GDOR 34).

Description: Thallus crustose, hemiendosubstratic or poorly evident, continuous to rimose, dirty olive-brown, becoming greenish when wet. Cortex very thin; algal layer 20-30 μm thick; medulla poorly evident, the thallus filled by numerous crystals which reach the algal layer. Perithecia black, up to 120/cm², sessile, covered with a thin thalline layer at the base, the apical part hemispherically projecting, up to 0.25 mm across, with a punctiform ostiole. Involucrellum homogeneously thick (20-30 μm), reaching to base-level and there slightly diverging from exciple, otherwise closely adpressed; exciple subglobose, 0.2-0.3 mm across, the wall colourless to very pale brown; hamathecium of periphyses and periphysoids measuring 20-30 x c. 3 μm, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I + blue. Asci 8-spored, clavate, I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum, Verrucaria-type. Ascospores 1-celled, hyaline, oblong-ellipsoid, (13-)15-20(-22) x (5-)7-9 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on more or less calciferous rocks, especially on pebbles and small stones in rather sheltered situations. A rather difficult taxon, very similar to V. dolosa and often confused with that species. Most of the records from South Tyrol are on siliceous rocks, but some are from calcareous substrata.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: rare

Oromediterranean belt: very rare

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

Herbarium samples

Index Fungorum GBIF

Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain