ITALIC 8.0

Phaeocalicium populneum (Duby) A.F.W. Schmidt

Mitt. Staatsinst. allg. Bot. Hamburg, 13: 132, 1970. Basionym: Calicium populneum Brond. ex Duby - Bot. Gall., 2: 638, 1830.

Synonyms: Calicium exile Anzi?; Embolidium populneum (Duby) Vain.; Phacotium populneum (Duby) Trevis.

Distribution: N - TAA (Nascimbene & al. 2007b, Puntillo & Puntillo 2009), Lomb (Puntillo & Puntillo 2009), Piem (Puntillo & Puntillo 2009). C - Umb (CLU 12212), Sar (Puntillo & Puntillo 2009).

Description: Thallus not evident, not lichenized. Apothecia stalked, dark grey to black, 0.4-0.7 mm high, the stalk to 0.04-0.06 mm thick, reddish in section, at least in the outer part, consisting of thick-walled, periclinally arranged hyphae filled with a reddish, oily substance, surrounded by a 2-5 µm thick, colourless gelatinous coat. Capitulum lenticular, 0.2-0.3 mm across, black, epruinose; mazaedium absent. Exciple well-developed, brown to reddish brown, with an aeruginose tinge in the inner part, 6-19 µm thick, formed by 3-6 layers of periclinallly arranged, sclerotized hyphae; epithecium brown to reddish brown, 5-12 µm thick, consisting of layers of anticlinallly arranged, sclerotized hyphae. Asci 8-spored, narrowly cylindrical, with a strongly thickened apex, formed singly from hooked ascogenous hyphae, with uniseriately arranged ascospores, persisting until the ascospores are mature. Ascospores 1-septate, medium brown, ellipsoid, 11-17 x 4-6.5 µm, with a smooth to indistinctly papillate wall, the septum paler than the wall, best visible in oil immersion. Photobiont absent. Spot tests: exciple and hypothecium N+ intensified reddish; stalk (in squash preparation) K- or usually K+ intensely green, N+ intensified reddish brown. Chemistry: without lichen substances.

Note: saprophytic on thin, mostly decaying twigs of Populus tremula.

Growth form: Fungus

Substrata: bark

Reproductive strategy: mainly sexual

Pioneer species

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: extremely rare

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 CC BY-SA 04

TSB 30265

Curtis Randall Björk, - CC BY-SA 4.0

Sugarbowl-Grizzly Den Provincial Park, British Columbia, Canada
August 2017

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

Herbarium: TSB (30265)
2003/03/17