ITALIC 7.0

Physconia muscigena var. bayeri (Nádv.) Poelt

Nova Hedwigia, 9: 30, 1965. Basionym: Physcia bayeri Nádv. - Stud. Bot. Cech., 8: 124, 1947.

Synonyms:

Distribution: N - VA (Piervittori & Isocrono 1999).

Description: Thallus foliose, heteromerous, dorsiventral, loosely attached, several thalli jointing into very irregular, up to 5 cm wide patches. Lobes 1-2(-3) mm broad, elongate, flattened, often imbricate and divided into erect smaller lobules especially in central parts, usually forming dense mats. Upper surface grey to grey-brown, but often densely white-pruinose; lower surface whitish at margin, black in the centre, with black, squarrosely branched rhizines. Upper cortex paraplectenchymatous; medulla yellowish lower cortex irregularly prosoplectenchymatous. Apothecia very rare, lecanorine. Asci 8-spored, elongate-clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, not thickened at apex, Physconia-type. Pycnidia frequent, black, immersed. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: cortex K-, C-, KC-, P-, UV-; medulla K+ pale yellow, KC+ yellow-orange. Chemistry: medulla with variolaric acid.

Note: On terricolous mosses and plant debris in alpine-subalpine situations, rare. A critical taxon, which needs further study.

Growth form: Foliose, narrow lobed

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: very 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

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

Herbarium: GZU Herb.Poelt (01-89)
2003/04/28
exposed yellowish medulla