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North American Lichen Herbaria
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Pycnora leucococca (Vain.) R. Sant.  
Family: Pycnoraceae
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Botanische Staatssammlung Munchen

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) – episubstratal – unspecified | squamulose (squamulous); compartimentized – areolate, squamulate; [th] upper surface: yellow(ish) grey | yellow(ish) brown | grey(ish) white; [th marginal and upper surface] specific structures: present; [th margin] cilia, cilioid structures: absent; [th upper surface] isidia, isidioid structures: absent; [th upper surface] soredia, soralia, soralioid structures: present; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (median) 0.4 (max) 1.0.  Ascomata: absent.  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.

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This project made possible by National Science Foundation Awards: #1115116