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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 ferruma Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 247 (1986). T: south-west of Quorn on the Port Augusta road, S.A., 17 Jan. 1982, M.E.Hale 58373; holo: US.  
  Thallus foliose, tightly adnate, to 5 cm wide. Lobes barely imbricate, subirregular to sublinear-elongate, irregularly branched, 1–2 (–3) mm wide; apices of marginal lobes subrotund. Upper surface pale yellow-green, blackening with age, dull, flat, emaculate, lacking soredia and isidia; central lobes becoming rugose; older lobes with transverse cracks; lobe margins often black. Medulla mostly white, intermittently orange adjacent to lower cortex. Lower surface flat, brown, rarely partly brown-black; rhizines moderately dense, short, slender, simple, concolorous. Apothecia sessile, 1–2 mm wide; disc concave then ±flat, brown-black; thalline exciple smooth, thick and involute, becoming thin and undulating. Ascospores 7–9 × 4.5–5.5 µm. Pycnidia common. Conidia bifusiform, 5–6 × 0.5 µm. CHEMISTRY: cortex K-, UV-; white medulla K+ yellow then dark red, C-, P+ intense yellow; pigmented medulla K+ violet; containing usnic acid, salazinic acid, skyrin (in pigmented medulla), consalazinic acid and ±protocetraric acid (trace).
  Very rare, on rock in subarid inland S.A.  
  Elix (1994z)  

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

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