ITALIC 7.0

Collema glebulentum (Cromb.) Degel.

H. Magn. ex Degel., Symb. Bot. Upsal., 13, 2: 406, 1954. Basionym: Leptogium glebulentum Nyl. ex Cromb. - J. Bot., 20: 272, 1882.

Synonyms: Collema coralliferum Degel.; Collema furvellum Räsänen

Distribution: N - TAA (Nascimbene & al. 2021, 2022).

Description: Thallus foliose, homoiomerous, gelatinous and (50-)65-135(-200) µm thick when wet, more or less deeply lobed, membranous, 3-6(-10) cm wide. Lobes closely to sometimes loosely adnate, 5-8 mm wide, 0.1-0.2 mm thick, dark olive-green to black, the surface conspicuously folded, with ascending, never swollen margins. Isidioid outgrowths abundant, laminal and marginal, c. 0.1 mm thick, up to 1.5 mm long, globose when young, then cylindrical and coralloid, usually crowded and forming a dense, coarsely areolate crust on older parts of thallus. Lower surface paler, with white to brownish hapters. Upper and lower cortices absent, or lower surface pseudocorticate; parts of thallus sometimes paraplectenchymatous. Apothecia and pycnidia unknown. Photobiont cyanobacterial (Nostoc, the cells in long chains). Spot tests: all negative. Chemistry: without lichen substances.

Note: an arctic-alpine species found on basic siliceous rocks, more rarely on limestone, in humid situations near or above treeline; another record is in Swiss territory, near the Italian border with Lombardy.

Growth form: Foliose, narrow lobed

Substrata: rocks

Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)

Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)

Commonnes-rarity: (info)

Alpine belt: extremely 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

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

Curtis Randall Björk, - CC BY-SA 4.0

Boundary Ranges, British Columbia, Canada
18.08.2018