Polyblastia albida Arnold
Flora, 41: 551, 1858.
Synonyms: Polyblastia alpina Metzler; Polyblastia circularis Blomb. ex T. Fr.; Polyblastia rodnensis Zschacke; Verrucaria lariana var. albida (Arnold) Garov.
Description: Thallus crustose, endosubstratic or thinly hemiendosubstratic, continuous, whitish to cream-coloured, smooth to rugose, often inapparent; deeper parts of thallus often with globose, up to 7 μm thick oil-cells. Perithecia numerous, black, globose, 0.2-0.35 mm across, completely immersed and leaving pits in the rock, visible as black dots corresponding to the sometimes slightly emerging, flattened periostiolar region. Involucrellum absent or poorly developed, apically 38–56 μm thick, adpressed to the exciple or diverging laterally, reaching halfway down, of intertwined, heavily sclerotized cells; exciple globose, dark throughout or sometimes paler in lower part, slightly thicker in the apical part; hamathecium of periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid, I+ red (I+ blue at very low concentrations of I), K/I+ blue. Asci 8-spored, clavate, K/I-, fissitunicate, the wall thickened above, with an ocular chamber, dehiscent by extrusion of an endotunica to form a delicate rostrum. Ascospores muriform, with 6-8 transverse septa and (2-)3-4 longitudinal septa, hyaline, ellipsoid, 22.5-29 x 11.3-14 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Crustose endolithic
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: rare
Subalpine belt: rather rare
Montane belt: rather rare
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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Occurrence data
Predictive map
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (24224)
2001/12/12
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_albida.htm
France, 18/5/2015 - Salignac-Eyvigues - Dordogne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_albida.htm
France, 18/5/2015 - Salignac-Eyvigues - Dordogne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_albida.htm
France, 18/5/2015 - Salignac-Eyvigues - Dordogne
Source: Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain
Source: Zschacke H. 1914. Die mitteleuropäsche Verrucariaceen. II. Hedwigia, 55: 286-324. Public Domain
a Perithezium von Ljk. 45, b von alpina Metzler, c 4 Sporen von
Arn. Orig.
Growth form: Crustose endolithic
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: rare
Subalpine belt: rather rare
Montane belt: rather rare
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
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (24224)
2001/12/12
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_albida.htm
France, 18/5/2015 - Salignac-Eyvigues - Dordogne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_albida.htm
France, 18/5/2015 - Salignac-Eyvigues - Dordogne
Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Polyblastia_albida.htm
France, 18/5/2015 - Salignac-Eyvigues - Dordogne
Source: Zschacke, H. (1934) Epigloeaceae, Verrucariaceae und Dermatocarpaceae. In: Dr. L. Rabenhorst‘s Kryptogamen-Flora, Band 9, Abt. 1, Teil 1. Akademische Verlagsgesellschaft, Leipzig, 695 pp. - Public Domain
