ITALIC 7.0

Umbilicaria cinerascens (Arnold) Frey

Hedwigia, 71: 115, 1931. Basionym: Gyrophora cinerascens Arnold - Verh. zool.-bot. Ges. Wien, 25: 438, 1875.

Synonyms:

Distribution: N - TAA, Lomb, Piem (Isocrono & al. 2004), VA (S- F215845).

Description: Thallus foliose-umbilicate, dorsiventral, usually polyphyllous, 3-4 cm wide, thick and rigid. Lobes ascending in the center, more or less adpressed towards margins, moderately incised, with undulate and perforated margins which sometimes have an eroded cortex. Upper surface mouse-grey, sometimes with cinnamon brown patches, dull, smooth to slightly rimose; lower surface black, sometimes dark grey along the margins, erhizinate, distinctly areolate only around umbilicus, almost completely (except around the umbilicus) covered with simple, dark brown, spherical to rarely ovoid thalloconidia. Upper cortex with a discontinuous necrotic layer; medulla white; lower cortex dark brown. Apothecia very rare (not observed in Italian material), black, leiodisc. Asci 8-spored, elongate-clavate, thick-walled, with an amyloid apical dome, Umbilicaria-type. Ascospores at first simple and hyaline, then muriform and brown. Photobiont chlorococcoid. Spot tests: K-, C+ red, KC+ red, P-. Chemistry: medulla with gyrophoric acid.

Note: on steeply inclined, often north-facing surfaces of siliceous rocks, mostly in small colonies, with optimum above treeline reaching the nival belt; almost certainly restricted to the Alps in Italy.

Growth form: Foliose, umbilicate

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by conidia and thalloconidia

Commonnes-rarity: (info)

Alpine belt: very rare

Subalpine belt: extremely 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

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6

(info)

Predictive model

Herbarium samples

Andres Saag - Source: http://www.eseis.ut.ee/LichenPhoto_2200/Umbilicaria_cinerascens_a3.jpg

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