ITALIC 7.0

Stereocaulon tomentosum Fr.

Sched. Crit., 3: 20, 1825.

Synonyms: Stereocaulon botryocarpum H. Magn.; Stereocaulon cupriniforme Nyl.; Stereocaulon tomentosum var. campestre Körb.

Distribution: N - Ven, TAA, Lomb (Rivellini & Valcuvia 1996), Piem (Jatta 1909-1911), VA (Piervittori & Isocrono 1999, Valcuvia 2000).

Description: rimary thallus crustose, ephemeral, usually absent in mature individuals. Pseudopodetia loosely attached, prostrate to ascending, to 3 cm tall, clearly dorsiventral, thickly grey-tomentose especially on lower surface, with a solid cartilaginous axis of parallel hyphae surrounded by a lax medulla. Phyllocladia abundant, granulose to squamulose, ash-grey, mostly rounded and flattened, often overlapping. Cephalodia inconspicuous, more or less spherical, to 0.7 mm across (usually less), embedded in the tomentum of the underside, with Nostoc. Apothecia frequent, up to 0.6 mm across, with a dark brown to blackish brown, convex disc and an indistinct margin, mainly located on lateral branches. Proper exciple brown in outer part, colourless within; epithecium brown, K-; hymenium colourless; paraphyses simple, slightly thickened above, with a dark cap; hypothecium colourless. Asci 8-spored, cylindrical-clavate, with a K/I+ blue outer layer and apical dome, and a central, K/I+ darker blue tube, Porpidia-type. Ascospores 3(-6)-septate, hyaline, fusiform, 20-50 x 8-10 µm. Pycnidia dark, immersed. Conidia filiform, straight. Main photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC-, P+ orange, UV-. Chemistry: atranorin, stictic acid and variable amounts of norstictic acid.

Note: a mainly boreal-montane, circumpolar lichen found on mineral soil in open habitats, such as in clearings of Pinus-stands; several Italian records need re-confirmation.

Growth form: Fruticose

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia (primary); cyanobacteria, filamentous (e.g. Nostoc, Scytonema) (secundary, e.g. in cephalodia)

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: 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

Herbarium samples

Index Fungorum GBIF

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (27699)
2001/12/11

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (27699)
2001/12/11
tomentum on main branch

Triin Aimla; Owner: University of Tartu

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.

var. alpestre

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.

var. compactum

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.