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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 willisii (Kurok. & Filson) Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 355 (1986); Parmelia willisii Kurok. & Filson in R.B.Filson, Austral. J. Bot. 30: 577 (1982). T: Eyre Highway, 18 km east of Koonalda, Nullarbor Region, S.A., 18 Oct. 1961, J.H.Willis; holo: MEL.  
  Thallus foliose, subpulvinate, unattached, forming irregular rosettes or cushions, to 1–3 cm wide. Lobes separate to subimbricate, often weakly convoluted, sublinear-elongate, subdichotomously to irregularly branched, exposing lower surface, 1–2.5 mm wide, lacking lobules. Upper surface pale yellow to pale yellow-green, flat to slightly convex, shiny, maculate, smooth or slightly rugulose in older lobes, lacking soredia and isidia. Medulla white. Lower surface flat to canaliculate, concolorous with upper surface; rhizines very sparse, simple or rarely sparsely branched, 1–3 mm long, black. Apothecia and pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K+ faint gold, C-, KC-, P+ yellow then orange-red; containing usnic acid, fumarprotocetraric acid, succinprotocetraric acid, ±protocetraric acid (trace) and ±physodalic acid (trace).
  Scattered, endemic, on soil in drier areas of southern Australia (W.A., S.A., southern Qld, N.S.W. and Tas.).  
  Elix (1994z)  

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

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