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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 rogersii Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 316 (1986). T: Girraween National Park, Qld, 2 July 1984, R.W.Rogers 2871 p.p.; holo: MEL.  
  Thallus foliose, loosely adnate, to 6–8 cm wide. Lobes variable, moderately to sparingly imbricate, flat, irregular to sublinear-elongate, irregularly branched, 2–3 (–5) mm wide; laciniae rarely developing, subdichotomously branched, 0.8–1.5 mm wide; apices crenulate, ±round. Upper surface yellow-green, darkening with age, dull, emaculate, smooth, lacking soredia and isidia; lobe margins commonly blackened. Medulla white. Lower surface jet black; lobe margins brown; rhizines sparse, simple, robust, concolorous. Apothecia scattered, sessile, to 12 mm wide; disc concave then undulate-distorted, brown to black-brown; thalline exciple thick and involute, becoming thin and persistent. Ascospores 8–9 × 5–6 µm. Pycnidia rare. Conidia bifusiform, 5 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then dingy brown, C-, P+ orange-red; containing usnic acid, fumarprotocetraric acid, succinprotocetraric acid and ±protocetraric acid (trace).
  Rare (known only from type in Australia), on rock in the ranges of south-eastern Qld; also in Uganda.  
  Elix (1994z)  

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

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