ITALIC 7.0

Enchylium polycarpon (Hoffm.) Otálora, P.M. Jørg. & Wedin subsp. corcyrense (Arnold)

Provisionally placed here, ICN Art. 36.1b.. Basionym: Lathagrium orbiculare var. corcyrense Arnold - Flora, 70: 152, 1887.

Synonyms: Collema polycarpon Hoffm. subsp. corcyrense (Arnold) Pišút; Collema polycarpon var. corcyrense (Arnold) Degel.; Collema ragusanum Zahlbr.; Collema salevense (Müll. Arg.) Zahlbr.; Collema stygium var. stygioides Flagey; Lathagrium akralense Flagey; Lathagrium flaccidulum; Lathagrium salevense; Synechoblastus salevensis

Distribution: N - VG (TSB 6529), Lomb, Piem, Lig. C - Laz (Nimis & Tretiach 2004), Sar. S - Camp (Nimis & Tretiach 2004), Pugl, Cal (TSB 6948), Si (Nimis & al. 1994).

Description: Thallus foliose, homoiomerous, gelatinous and 200-300 µm thick when wet, deeply lobed, forming 3-8(-20) cm wide rosettes. Lobes radiating, elongate, 2-4(-6) mm wide, contiguous, adnate for most of their length, with small adventive, ascending or erect lobules along the margins towards the center, often slightly channelled towards apices, the tips much swollen and coarsely plicate. Upper surface olive-green to brownish, more rarely black, dull, sometimes with granular isidia-like outgrowths; lower surface usually somewhat paler with tufts of white hapters. Upper and lower cortex absent. Apothecia common, lecanorine, terminal and marginal, crowded towards thallus center, sessile to stipitate (often borne on the marginal lobules), 1.5-3.5 mm across, with a flat to slightly convex, red-brown to (rarely) black disc, and a rather thick, smooth, persistent thalline margin. Thalline exciple ecorticate; proper exciple rather thin, euthyplectenchymatous or subparaplectenchymatous; hymenium colourless, 65-110 µm high, I+ blue; paraphyses simple or sparingly branched in upper part, 2-3 µm thick at mid-level, the apical cells 4-6.5 µm wide; hypothecium yellowish or yellowish brown, I+ blue. Asci 8-spored, cylindrical-clavate, the apex strongly thickened, the apical dome K/I+ pale blue, with a downwardly projecting K/I+ deep blue tubular structure. Ascospores (2-)3(-4)-septate, hyaline, fusiform with acute ends, 15-34 x 6.5-8.5 µm. Pycnidia laminal or marginal, immersed in warts, globose, paler than thallus. Conidia bacilliform, usually with swollen ends, straight or slightly curved, 5-7 x 1-1.5 µm. Photobiont cyanobacterial (Nostoc, the cells in long chains). Spot tests: all negative. Chemistry: without lichen substances.

Note: more thermophytic and more southern than the typical subspecies, this taxon is worthy of further study.

Growth form: Foliose, broad lobed

Substrata: rocks

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

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: rare

Padanian area: very rare

Humid submediterranean belt: rather rare

Humid mediterranean belt: rather rare

Dry mediterranean belt: rare

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

P.L. Nimis CC BY-SA 4.0

TSB 6529

Andrea Moro; Owner: Department of Life Sciences, University of Triedte

Italy, Friuli Venezia Giulia, Trieste, Trieste Karst, Rocca di Monrupino
20/02/2017