Porpidia speirea var. alpina (Hepp ex Arnold) Clauzade & Cl. Roux ex Hafellner & Türk
Stapfia, 76: 155, 2001.. Basionym: Lecidea contigua f. alpina Hepp ex Arnold - Flora, 53: 227, 1870.
Synonyms: Lecidea speirea var. alpina (Hepp ex Arnold) Hertel
Description: Thallus crustose, episubstratic, continuous to rimose, chalky white, rarely delimited by a thin dark prothallus. Medulla white, I+ blue. Apothecia lecideine, black, (0.2-)0.6-1(-1.2) mm across, long remaining immersed in the thallus, with a pruinose, concave to flat disc (turning convex only in very old apothecia) and a persistent proper margin. Proper exciple, when young, with a broad marginal black layer and a narrow inner colourless layer of radiating hyphae, the latter progressively disappearing, leaving a thin, black-brown exciple reacting K-; epithecium brownish green to green-black, 15-20 µm high, K-, N-; hymenium very pale yellowish green to colourless, 70-105 µm high; paraphyses coherent, branched and anastomosing in upper part, 1.6-2.2 µm thick at mid-level, the apical cell to 3.5 µm wide; hypothecium brown-black, 200-600 µm high. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which are strongly amyloid, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, 10-21 x 5-9(-11) μm, not halonate, often filled by conspicuous oil droplets. Pycnidia black, immersed. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: cortex and especially medulla K- or K+ pale yellow, C-, KC-, P- or P+ pale yellow, K/UV+ faintly mauve. Chemistry: confluentic acid (major but often in low amounts), 2’-O-methylmicrophillinic and 2’-O-methylperlatolic acids (minor).
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: very rare
Subalpine belt: very rare
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: absent
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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Bernard Bouffinier - CC BY-SA 4.0 Source: https://www.lichensmaritimes.org/?task=fiche&lichen=997&lang=fr
France, Corse
as P. speirea
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: very rare
Subalpine belt: very rare
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: absent
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
