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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 incrustata (Kurok. & Filson) Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 269 (1986); Parmelia incrustata Kurok. & Filson, Bull. Natl Sci. Mus., ser. B, 1: 39 (1975). T: summit of Wallabyng Ra., about 21 km north of Kingoonya, S.A., 28 Oct. 1970, R.B.Filson 11958; holo: MEL.  
  Thallus foliose, adnate, to 2–4 cm wide. Lobes imbricate or not, subirregular, irregularly branched, 0.8–2 mm wide. Upper surface yellow to pale yellow-green, dull, emaculate, irregularly cracked, lacking soredia and isidia; marginal lobes and laciniae convex; older lobes becoming distinctly rugulose and ±areolate or verruculose; lobes often with blackened margins at apices. Medulla white. Lower surface ivory to pale brown, often darkening towards lobe apices; some marginal or secondary central lobes canaliculate; rhizines sparse, simple, tufted or not, 0.1–0.3 mm long, brown. Apothecia sessile, to 4 mm wide; disc concave, becoming undulating, dark brown; thalline exciple smooth, thick and involute, becoming thin, slightly crenulate, persistent. Ascospores 10–12 × 5–6 µm. Pycnidia rare. Conidia bifusiform, 6–7 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC+ rose, P-; containing usnic acid, norlobaridone and loxodin; rarely containing scabrosin 4,4'-dibutyrate, scabrosin 4-acetate 4'-butyrate or scabrosin 4-acetate 4'-hexanoate.
  Common but restricted, endemic, on exposed rock and pebbles in arid grasslands of inland W.A. and S.A.  
  Elix (1994z)  

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

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