ITALIC 7.0

Poeltinula cacuminum (Asta, Clauzade & Cl. Roux) Cl. Roux

Bull. Soc. linn. Provence, 54: 120, 2003. Basionym: Encephalographa cerebrina subsp. cacuminum Asta - Clauzade & Cl. Roux in Clauzade & Roux, Bull. Soc. linn. Provence, 30: 11, 1978.

Synonyms:

Distribution: N - Frl.

Description: Thallus crustose, mostly endosubstratic and poorly evident. Apothecia black, sessile, very variable in outline (rounded to polygonal), usually confluent, with a raised, sinuous margin and a disc soon provided with a ring-formed umbo. becoming strongly irregular by the confluence of several umbos. Proper exciple thick, dark reddish brown, K+ intensifying reddish; epithecium olive-grey or olive-brown, K-, N+ red; hymenium colourless, 50-80(-100) µm high, I+ blue; paraphyses 1.5-3 µm thick, bifurcate in upper part and rarely anastomosing, the apical cells slightly swollen, to 5 µm thick, with a dark cap; hypothecium dark reddish brown, extending down into a sort of peduncle which is 200-600 µm deep. Asci 8-spored, clavate, fissitunicate, with a well-developed, I+ pale blue tholus surrounded by a I+ blue gelatinous layer, lacking an ocular chamber, Rhizocarpon-type. Ascospores 1-septate, constricted at septum, at first hyaline but soon turning dark brown to violet-black (paler near septum), N+ red, oblong-ellipsoid, (10-)12-16(-18) x 6-9(-10) µm, with a distinct epispore and a thin, sometimes poorly visible, colourless gelatinous sheath. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on hard calciferous and dolomitic rocks in exposed, but not sunny situations, with optimum above treeline; much overlooked, probably more widespread in the Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: 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

Pier Luigi Nimis

Italy
TSB 37888

Pier Luigi Nimis

Italy
TSB 37888

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