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Bacidia friesiana (Hepp) Korber
Family: Ramalinaceae
[Bacidia effusa f. hemipolia ,  more]
Bacidia friesiana image

Global occurrence: Eurasia – Europe | Americas – North America (incl Mexico) | Arctic.  Substrate: bark, cork, plant surface – trunks, branches, twigs.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: crustose (crustaceous) – endosubstratal, inconspicuous, immersed | crustose (crustaceous) – episubstratal – unspecified; continuous, diffuse, effuse | granular, granulose, granulate; [th] upper surface: grey(ish) | brown(ish) grey, epruinose; [th marginal and upper surface] specific structures: absent; [th] morphol substructures (eg areoles, lobes, branches) upper surface: granulose, granular.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (min) 0.1(median) 0.2 (max) 0.2; ascoma: sessile, superficial; [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded | subconvex, slightly convex | convex; [ascm, if apoth] disc, mazaedium: grey(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | blue(ish) black | blue(ish) grey | grey(ish) blue | green(ish) blue | brown(ish) yellow (ochraceous, ochre) | grey(ish) brown; [ascm, if apoth] disc, mazaedium: epruinose; [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | blue(ish) grey | grey(ish) blue | green(ish) blue | brown(ish) yellow (ochraceous, ochre); [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: hyaline, colourless; [ascm] paraphyses/-oids: present; [ascm] paraphyses/-oid cells width [µm]: (median) 1.5; [ascm] paraphyses/-oid apical cells width [µm]: (min) 1.6(median) 2.3 (max) 3.2; [ascm] epihymenium, epithecium: hyaline, colourless | blue(ish) black | blue(ish) green (turquoise) | brown(ish) green (olivaceous, olive green).  Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: amyloid with acuate axial body towards the apex (= Bacidia-, Buellia-, Ramalina-types etc).  Ascospores: (median) 8.0; [asp] shape: filiform, vermiform; [asp] length [µm]: (low) 30.0(median) 34.0 (high) 38.0; [asp] width [µm]: (min) 2.0 (low) 2.5(median) 3.1 (high) 3.7; [asp] septa: present, transversely septate; [asp] transversal septa: (low) 7.0(median) 7.0 (high) 9.0; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.