Lecanographa amylacea (Pers.) Egea & Torrente (trentepohlioid)
Bibl. Lichenol., 54: 122, 1994. Basionym: Lichen amylaceus Ehrh. ex Pers. - Plant. Crypt. Exsicc.: 303, 1793.
Synonyms: Lecanactis amylacea (Pers.) Arnold; Lecanactis illecebrosa (Dufour) Fr.; Lecidea farinosa (Ach.) Röhl. non H. Magn.; Opegrapha illecebrosa Dufour; Schismatomma illecebrosum (Dufour) A. Massal.
Description: This lichen appears in two very different morphotypes, depending on the photobiont, this description refers to the form with a trentepohlioid photobiont (corresponding to the type): Thallus crustose, episubstratic, continuous to rimose, thick, chalky white to grey-white, farinose, usually with numerous, pale brown, c. 0.2 mm wide granular flecks, sometimes delimited by a discontinuous, dark prothalline line. Apothecia not always present, round to irregular in outline but never lirelliform, 0.2-0.6 mm across, more or less immersed in the thallus, with a concave to slightly convex, black but densely white-pruinose disc and a thin, usually epruinose, black, persistent proper margin. Proper exciple black, extending below the hymenium; epithecium brown; hymenium colourless, 65-85 µm high, I+ blue, then reddish; paraphysoids sparingly branched and anastomosing, 1-1.5 µm thick, with poorly swollen, brown-tipped apices; subhymenium pale brown, 30-40 µm high; hypothecium dark brown to black. Asci 8-spored, narrowly clavate to cylindrical, fissitunicate, the apex with a narrow, K/I± pale blue apical dome penetrated by a small ocular chamber surrounded by a small, K/I+ dark blue, ring-like zone (Grumulosa-type of Egea & Torrente 1994). Ascospores 3(-4)-septate, hyaline, fusiform, straight or slightly curved, (14-)17-25(-28) x (2-)3-3.5 µm, with a thin gelatinous perispore. Pycnidia rare, immersed, globose, black. Conidia hyaline, bacilliform, straight, 5-7 x 1-1.2 µm. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV-; medulla UV+ white, K/UV–. Chemistry: an unknown UV+ substance in the medulla.
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: absent
Dry submediterranean belt: extremely rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Domenico Puntillo; Owner: Domenico Puntillo
Italy
Growth form: Crustose
Substrata: bark
Photobiont: Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
In underhangs rarely wetted by rain
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: absent
Dry submediterranean belt: extremely rare
Humid submediterranean belt: very rare
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
