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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
Xanthoparmelia erosa (Elix & P.M.Armstr.) Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 241 (1986); Parmelia erosa Elix & P.M.Armstr., Austral. J. Bot. 31: 472 (1983). T: Eyre Highway, east of Kimba, S.A., R.B.Filson 11730a; holo: MEL.  
  Thallus foliose, unattached, to 2–5 cm wide. Lobes strongly convolute, contorted, elongate, sublinear, sparsely dichotomously branched, 3.5–8 mm wide when flattened, 1–4 mm when dry and convoluted. Upper surface pale yellow-green, darkening in older central lobes, shiny, rugulose and cracked, emaculate, without isidia; upper cortex erupting and upper surface becoming sorediate, ultimately eroding and becoming extensively covered with granular soredia; soredia also developing in cracks and fissures. Medulla white. Lower surface pale brown to dark brown; rhizines very sparse, simple, concolorous. Apothecia and pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then red, C-, P+ orange; containing usnic acid, salazinic acid and consalazinic acid.
  Very rare, endemic, on soil in subarid shrubland on Eyre Peninsula and Gawler Ra. (S.A.).  
  Elix (1994z)  

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

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