Elixia flexella (Ach.) Lumbsch

J. Hattori Bot. Lab., 83: 62, 1997. Basionym: Limboria flexella Ach. - K. Vetensk.-Akad. Nya Handl.: 258, 1815.
Synonyms: Hazslinszkya inarensis Vain.; Lecidea flexella (Ach.) Hedl.; Leptographa flexella (Ach.) M. Choisy; Lithographa flexella (Ach.) Zahlbr.; Ptychographa flexella (Ach.) Coppins; Xylographa flexella (Ach.) Nyl.; Xylographa flexella f. plicata Anzi ex Arnold
Distribution: N - Frl (Nascimbene & al. 2021), Ven (Nascimbene & al. 2021), TAA (Nascimbene & al. 2007b, Spribille & Lumbsch 2010), Lomb.
Description: Thallus crustose, mostly endosubstratic and poorly evident, consisting of more or less scattered goniocysts provided with a cortex of isodiametric, brown-capped cells. Apothecia black, epruinose, sessile, constricted at base, 0.3-0.8 x 0.2-0.4 mm, from narrowly elongate to angular or more or less rounded, with a initially slit-lixe, later expanded and sometimes gyrose-umbonate disc, and a prominent, more or less inrolled proper margin. Proper exciple cupulate, dark brown to brown-black, up to 65 μm wide; epithecium brown; hymenium colourless to pale yellow, 30-55 μm high, I+ weakly blue; paraphyses coherent, 1-1.5 μm thick at mid level, simple or sparingly branched and anastomosing in upper part, the apical cells only slightly thickened (< 3 μm); hypothecium dark brown, in continuation with the exciple. Asci 8-spored, clavate to subcylindrical, I+ blue after pre-treatment with K, with a light amyloid tissue throughout, but with darker staining regions around the apex and in a narrow zone below the inner upper wall of tholus. Ascospores 1-celled, hyaline, broadly ellipsoid, 4-6(-8) x 2-4.5 μm, not halonate. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: thallus without lichen substances.
Note: on lignum, especially on vertical sides of stumps, with optimum in the subalpine belt; certainly more widespread in the Alps.
Growth form: Crustose
Substrata: lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: rare
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent


pH of the substrata:

(info)

1

2

3

4

5

Solar irradiation:

(info)

1

2

3

4

5

Aridity:

(info)

1

2

3

4

5

Eutrophication:

(info)

1

2

3

4

5

Poleotolerance:

(info)

0

1

2

3

Altitudinal distribution:

(info)

1

2

3

4

5





P.L. Nimis CC BY-SA 4.0
TSB 38546



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (8204)
2001/11/29



Curtis Randall Björk
USA, Idaho, Shoshone County, St. Maries River Valley - - On bark of Thuja in swamp forest
2008-04-01



Pier Luigi Nimis - CC BY-SA 4.0
TSB 38546



Pier Luigi Nimis - CC BY-SA 4.0
TSB 38546



Curtis Randall Björk
USA, Idaho, Shoshone County, St. Maries River Valley - - On bark of Thuja in swamp forest
2008-04-01



P.L. Nimis CC BY-SA 4.0
TSB 41770



P.L. Nimis CC BY-SA 4.0
TSB 41770



P.L. Nimis CC BY-SA 4.0
TSB 41770



P.L. Nimis CC BY-SA 4.0
TSB 38545



P.L. Nimis CC BY-SA 4.0
TSB 38545