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Pannaria hookeri (Borrer ex Sm.) Nyl.
Family: Pannariaceae
[Lecanora hookeri (Borrer) Hook.,  more]
Pannaria hookeri image
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified | foliose (foliaceous), leaf-like [th] upper surface: grey(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | white(ish) [th upper surface]: epruinose [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 1.0 (high) 3.0 [th] morphol substructures (eg areoles, squamules): discontiguous, dispersed (towards thallus periphery) [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | verrucose, warted | maculate [th] morphol substructures (eg lobes, branches): irregular ascomata: absent | present ascoma: apothecial, apothecioid – hymenial ascoma [mm]: (low) 1.0 (high) 2.0 ascoma: subsessile, subimmersed, adnate, semi-immersed, emergent | sessile, superficial [ascm, if apoth] disc, mazaedium: plane, flat, flattened, expanded [ascm, if apoth] disc, mazaedium: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) [ascm, if apoth] disc, mazaedium: epruinose [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: blue(ish) grey [ascm, if apoth] margin excipular photobionts: present | abundant [ascm] paraphyses/-oids: present [ascm] epihymenium, epithecium: green(ish) black | black(ish) brown asci: lecanoralean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): absent ascospores: (median) 8.0 [asp] shape: globose, spherical | subglobose, subspherical | broadly ellipsoidal | ellipsoidal [asp] length [µm]: (min) 11.0 (low) 12.0 (high) 15.0 [asp] width [µm]: (low) 8.0 (high) 11.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent secondary metabolites: present secondary metabolites: pannarin primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: cyanobacterial.

substrate: bryophytes – mosses, liverworts | rock – siliceous, siliciferous, acidic | rock, stones, pebbles – unspecified.