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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 dayiana (Elix & P.M.Armstr.) Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 225 (1986); Parmelia dayiana Elix & P.M.Armstr., Austral. J. Bot. 31: 468 (1983). T: near Kalgoorlie, W.A., June 1982, M.F.Day; holo: MEL.  
  Thallus subcrustose, tightly adnate, to c. 2–3 cm wide. Lobes not imbricate, discrete at thallus periphery, flat, subirregular to sublinear, irregularly branched, 0.5–1 mm wide. Upper surface pale yellow-green, dull, emaculate, without soredia; older lobes irregularly cracked and becoming areolate; isidia numerous, globose becoming subcylindrical, branched or not, becoming inflated at apices; isidia apices epicorticate and erumpent but not sorediate. Medulla white. Lower surface pale brown to brown; rhizines moderately dense, simple, concolorous. Apothecia and pycnidia not observed. CHEMISTRY: cortex K-, UV-; medulla K- or K+ faint brown, C-, P+ orange-red; containing usnic acid, fumarprotocetraric acid, succinprotocetraric acid and protocetraric acid (trace).
  Rare, endemic, on exposed rock in inland W.A. and N.T.  
  Elix (1994z)  

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

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