ITALIC 7.0

Polyblastia helvetica Th. Fr.

Bot. Not.: 112, 1865.

Synonyms: Amphoroblastia helvetica (Th. Fr.) Servít

Distribution: N - Frl, Ven (TSB 15382), Lomb (Nascimbene 2006).

Description: Thallus crustose, episubstratic, thin and film-like to finely granular, subgelatinous when wet, pale to blackish grey, often inconspicuous. Perithecia black, 0.3-0.5 mm across, more or less immersed, globose or slightly flattened at the top. Involucrellum absent; exciple dark in upper part, pale brown in lower part; hamathecium of periphyses and periphysoids, interascal filaments absent. Asci (1-)2-spored, clavate, K/I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum. Ascospores strongly muriform, dark brown, cylindrical-ellipsoid, 70-150 x 30-60 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on more or less calciferous soil, often amongst bryophytes, with optimum near treeline; restricted to the Alps in Italy. A species of unclear affinities, which does not belong to Polyblastia s.str.

Growth form: Crustose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: rare

Oromediterranean belt: absent

Montane belt: absent

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

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_helvetica.htm

France, 25/8/2017 - Thoiry - Ain

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_helvetica.htm

France, 25/8/2017 - Thoiry - Ain

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_helvetica.htm

France, 25/8/2017 - Thoiry - Ain

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_helvetica.htm

France, 25/8/2017 - Thoiry - Ain

Source: 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