Protoblastenia siebenhaariana subsp. albida (Asta & Cl. Roux) Clauzade & Cl. Roux
Bull. Soc. bot. Centre-Ouest, N. sér., nr. spec. 7: 828, 1985.. Basionym: Protoblastenia rupestris subsp. albida Asta & Cl. Roux - Bull. Mus. Hist. Nat. Marseille, 37: 77, 1977.
Synonyms:
Distribution:
Description: Thallus crustose, episubstratic, rimose to areolate, rarely areolate-verrucose, whitish to yellowish white. Apothecia biatorine, not constricted at base, 0.3-1.2 mm across, with an orange to orange-red, convex, smooth disc and a very thin, soon excluded proper margin. Proper exciple poorly developed, of branched hyphae; epithecium orange to orange-brown, with granular crystals reacting K+ purple-red, N-; hymenium colourless to pale orange; paraphyses coherent, sparingly branched and anastomosing, the apical cells hardly swollen; hypothecium colourless to very pale yellowish brown. Asci 8-spored, clavate, with a well-developed, amyloid tholus containing a more intensely amyloid, indistinct tube structure, without an ocular chamber, approximating the Porpidia- or Psora-types. Ascospores 1-celled, hyaline, ellipsoid to ovoid, thin-walled, 6-11 x 3-6 µm, without a distinct perispore. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ purple-red. Chemistry: apothecia with anthraquinones, mainly parietin.Note: similar to var. siebenhaariana, but with a colourless hypothecium and a different ecology (mostly associated to Lecanora albula); the application of the name was often inconsistent, so that the distributional data in the Alps (outside France) are hardly reliable. To be looked for in the Italian Alps.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Predictive model
