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Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Flavoparmelia diffractaica Elix & J.Johnst.
  Mycotaxon 33: 391 (1988); T: 10 km north-east of Eden Valley along the Keyneton road, S.A., 21 May 1976, J.A.Elix 2267; holo: CANB.  
  Thallus adnate, to 5–10 cm wide. Lobes often crowded and imbricate, flat, 2–5 mm wide; margins crenulate; apices rotund. Upper surface dark green to yellow-green, broadly undulating, rugose centrally, mostly dull, emaculate, lacking soredia, dactyls and isidia; lobe apices shiny, with black margins. Medulla white. Lower surface black; rhizines sparse, short, simple or tufted, concolorous. Apothecia sessile, to 8 mm wide; disc concave, becoming undulate-distorted, cinnamon-brown to dark brown; thalline exciple involute at first, smooth, becoming rugulose. Ascospores 11–14 × 6–8 µm. Pycnidia common. Conidia weakly bifusiform, 7–9 × 1 µm. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P+ orange; containing usnic acid, protocetraric acid (minor), diffractaic acid (major), barbatic acid (trace), 4-O-demethylbarbatic acid (trace), baeomycesic acid (trace), obtusatic acid (trace), ±virensic acid (trace), unidentified compound (trace), ±caperatic acid and ±atranorin.
  Endemic, widely scattered in central and southern Australia (W.A., N.T., S.A. and N.S.W.). Occurs on bark.  
  Elix (1994g)  

Checklist Index
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

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