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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 nashii Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 293 (1986). T: north-east of Hyden, W.A., 8 Aug. 1981, T.H.Nash 20392; holo: ASU.  
  Thallus foliose, adnate, to 5–6 cm wide. Lobes imbricate or not, sublinear-elongate, irregularly branched, 1–2 (–3) mm wide; occasionally narrower laciniae overlie thallus centre. Upper surface yellow-green, darkening, flat to slightly concave, shiny at least near apices, emaculate, smooth, without soredia; lobe margins often blackened, particularly towards apices; isidia dense, simple, cylindrical, occasionally becoming sparingly branched; isidia apices syncorticate and intact. Medulla white. Lower surface flat, dull, smooth, black; rhizines sparse to moderately dense, simple, slender, 0.3–0.5 mm long, black. Apothecia not seen. Pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P-; containing usnic acid, diffractaic acid (major) and barbatic acid (trace), 4-O-demethylbarbatic acid (trace) and 3-a-hydroxybarbatic acid (trace).
  Very rare, endemic, on rock in subarid south-western W.A.  
  Elix (1994z)  

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

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