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North American Lichen Herbaria
- building a Global Consortium of Bryophytes and Lichens as keystones of cryptobiotic communities -
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Platismatia lacunosa (Ach.) Culb. & C. Culb.  
Go To Encyclopedia of Life...
Family: Parmeliaceae
[Cetraria lacunosa Ach., moreCetraria lacunosa f. cavernosa (Menzies) G. Merr., Cetraria lacunosa f. lacunosa Ach., Cetraria lacunosa var. lacunosa Ach.]
Platismatia lacunosa image
Stephen Sharnoff  
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Botanische Staatssammlung Munchen

Global occurrence: Americas – North America (incl Mexico) | Arctic.  Substrate: bryophytes – mosses, liverworts | wood – dead, living | bark, cork, plant surface – trunks, branches, twigs | rock, stones, pebbles – unspecified.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: 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) 5.0 (high) 10.0 (max) 15.0; [th] morphol substructures (eg areoles, squamules): distantly discontiguous; [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | rugose, plicate, folded, pustulate, faveolate, wrinkled; [th] morphol substructures (eg lobes, branches): irregular; [th] lower surface: black(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon); [th lower surface] specific structures: present; [th lower surface] rhizines, rhizoid structures: present; [th lower surface] rhizines, rhizinoid structures: unbranched, simple.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (low) 4.0 (high) 20.0; ascoma: sessile, superficial; [ascm, if apoth] disc, mazaedium: concave | plane, flat, flattened, expanded; [ascm, if apoth] disc, mazaedium: 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: grey(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | white(ish); [ascm, if apoth] margin excipular photobionts: present | abundant; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: hyaline, colourless; [ascm] paraphyses/-oids: present; [ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | yellow(ish) brown.  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] shape: ellipsoidal | ovoid, ovate; [asp] length [µm]: (low) 7.0 (high) 10.0; [asp] width [µm]: (low) 3.0 (high) 4.5; [asp] septa: absent – spore lumen unilocular, monolocular; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Conidiomata: absent | present.  Conidia: bacilliform, bacillary; [co] length [µm]: (low) 4.0 (high) 7.0.  Secondary metabolites: present; atranorin | caperatic acid | chloroatranorin | fumarprotocetraric acid.  Primary photobiont: present, chlorophytaceous – trebouxiaceous, chlorococcoid.  Secondary photobionts (eg in cephalodia): absent.

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Platismatia lacunosa
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Platismatia lacunosa image
Stephen Sharnoff  
Platismatia lacunosa image
Stephen Sharnoff  
Platismatia lacunosa image
Stephen Sharnoff  
Platismatia lacunosa image
Stephen Sharnoff  
Platismatia lacunosa image
Stephen Sharnoff  
Platismatia lacunosa image
Stephen Sharnoff  
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This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394