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Micarea lignaria (Ach.) Hedl.
Family: Pilocarpaceae
[Bacidia lignaria (Ach.) Lettau,  more]
Micarea lignaria image
André Aptroot  
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified thallus: continuous, diffuse, effuse [th] upper surface: grey(ish) | green(ish) [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, lobes, branches) upper surface: verrucose, warted ascomata: absent | present ascoma: apothecial, apothecioid – hymenial [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | convex [ascm, if apoth] disc, mazaedium: black(ish) [ascm] paraphyses/-oids: present asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): present [asc] tholus amyloidity pattern: with amyloid tube, ring (= Collema-, Micarea-, Porpidia-, Psora-types etc) ascospores: (median) 8.0 [asp] length [µm]: (low) 16.0 (high) 34.0 (max) 38.0 [asp] width [µm]: (low) 4.0 (high) 6.0 (max) 7.0 [asp] septa: present [asp] septa: transversely septate [asp] transversal septa: (low) 3.0 (high) 7.0 secondary metabolites: present primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: wood – dead, living | bark, cork, plant surface – trunks, branches, twigs.