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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 mannumensis (Elix) Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 283 (1986); Parmelia mannumensis Elix, Austral. J. Bot. 29: 359 (1981). T: along Gorge Ck, west of Mannum, S.A., 29 Dec. 1977, J.A.Elix 4215; holo: MEL.  
  Thallus foliose, loosely adnate, to 7–10 cm wide. Lobes densely imbricate, ±forming a rather thick mat, flat, sublinear-elongate, dichotomously to irregularly branched, 0.5–1.5 (–2) mm wide. Upper surface greenish yellow, shiny, distinctly to effigurately maculate, smooth, lacking soredia and isidia; lobes often black-margined particularly towards apices. Medulla white. Lower surface rugulose or not, black; rhizines sparse to moderately dense, simple, robust, black. Apothecia subpedicellate, 2–5 mm wide; disc concave, dark brown; thalline exciple maculate. Ascospores 6–8 × 4–5 µm. Pycnidia common. Conidia bifusiform, 5–6 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P-; containing usnic acid, diffractaic acid (major), barbatic acid (minor), 4-O-demethylbarbatic acid (trace), obtusatic acid (trace) and norobtusatic acid (trace).
  Very rare, endemic, on exposed rock in temperate to subarid areas of S.A., 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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