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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 vicaria Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 352 (1986). T: Gunners Quoin, Tas., M.A.Cutliffe (G.C.Bratt 73/553); holo: HO.  
  Thallus foliose, adnate, to 3–4 cm wide. Lobes imbricate, irregular, irregularly branched, 1–2 (–3) mm wide; occasionally with narrower laciniae overlying thallus centre. Upper surface yellow-green, darkening with age, flat to slightly concave, shiny near apices, emaculate, rugulose, without soredia; lobe margins often blackened, particularly towards apices; isidia forming a dense mat in thallus centre, cylindrical, simple then coralloid-branched; isidia apices syncorticate and intact. Medulla white. Lower surface flat, shiny, rugulose, black, brown at apices; rhizines moderately dense, slender, simple or occasionally tufted and branched, black. Apothecia and pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC+ yellow, P-; containing usnic acid, barbatic acid, 4-O-demethylbarbatic acid and 3-a-hydroxybarbatic acid (trace).
  Very rare, endemic, known only from the type collection. Grows on rock.  
  Elix (1994z)  

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

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