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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 oleosa (Elix & P.M.Armstr.) Elix & T.H.Nash
  Mycotaxon 26: 455 (1986); Parmelia oleosa Elix & P.M.Armstr., Austral. J. Bot. 31: 478 (1983). T: along the Tuross River, 13 km south of Countegany, N.S.W., 24 Sept. 1979, J.A.Elix 6397; holo: MEL.  
  Thallus small-foliose, often becoming subcrustose towards centre, very tightly adnate, to 3–6 cm wide. Lobes barely imbricate, flat, sublinear-elongate to subirregular, irregularly branched, 0.8–1.5 (–2) mm wide. Upper surface yellow-green, becoming greyish black, dull or shiny towards lobe apices, emaculate, lacking soredia and isidia; lobe margins commonly black, particularly towards apices; older lobes extensively fractured and areolae c. 1 mm wide formed. Medulla white. Lower surface tan to dark brown, often somewhat darker to smoke-grey near lobe apices; rhizines moderately dense, simple, brown. Apothecia sessile to subpedicellate, 1–2 (–4) mm wide; disc concave, dark brown; thalline exciple thin, entire, smooth. Ascospores 7–8 × 3.5–4.5 µm. Pycnidia common. Conidia bifusiform, 5–6 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P-; containing usnic acid, protoconstipatic acid, constipatic acid, dehydroconstipatic acid and pertusaric acid.
  Widely distributed but rarely common, on rock in drier areas of southern and central Australia (W.A., N.T., S.A., N.S.W., A.C.T. and Tas.); also on the South Is. of New Zealand (central Otago), U.S.A. (Arizona) and Mexico.  
  Elix (1994z)  

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

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