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Physcia albinea (Ach.) Nyl.
Family: Physciaceae
[Parmelia albinea Ach.,  more]
Physcia albinea image
Stephen Sharnoff  

Global occurrence: Eurasia – Asia Extratropical | Eurasia – Europe | Americas – North America (incl Mexico) | Arctic.  Substrate: rock, stones, pebbles – unspecified.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: placodioid-crustose, placodioid-foliose | foliose (foliaceous), leaf-like; [th] upper surface: grey(ish); [th upper surface]: epruinose; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (median) 0.5; [th] morphol substructures (eg areoles, lobes, branches) upper surface: maculate; [th] lower surface: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | white(ish); [th lower surface] specific structures: present; [th lower surface] rhizines, rhizoid structures: present.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (low) 1.0 (high) 5.0; ascoma: sessile, superficial; [ascm] paraphyses/-oids: present.  Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: amyloid with widening axial body towards the apex (= Lecanora-, Parmelia-, Rinodina-types etc).  Ascospores: (median) 8.0; [asp] length [µm]: (min) 14.0 (low) 16.0 (high) 19.0 (max) 21.0; [asp] width [µm]: (min) 7.0 (low) 8.0 (high) 10.0 (max) 11.0; [asp] septa: present, transversely septate; [asp] transversal septa: (median) 1.0; [asp] pigmentation: medium brown, brownish.  Conidiomata: absent | present.  Conidia: cylindrical; [co] length [µm]: (median) 5.0.  Secondary metabolites:  present, atranorin.  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.