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, without isidia or with granular isidia; 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, subcylindrical to narrowly clavate, the apex thick, with a I+ blue apical dome and a I+ blue annulus projecting downwardly. 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:


Solar irradiation:








Altitudinal distribution:


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