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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
Pertusaria xanthoplaca Müll.Arg.
  Flora 65: 485 (1882)
T: Toowoomba, Qld, 1881, C.Hartmann 32; holo: G; iso: MEL 7286. *****Pertusaria persulphurata Müll.Arg., Nuovo Giorn. Bot. Ital. 23: 391 (1891). T: Brisbane, Qld, F.M.Bailey s.n.: holo: G. *****Pertusaria sulphurata Müll.Arg., Hedwigia 32: 125 (1893). T: Brisbane, Qld, 1891, F.M.Bailey s.n.; holo: G. *****Pertusaria fallax f. sulphurea F.Wilson, Victorian Naturalist 4: 87 (1887), nom. nud.
  Thallus dull to bright yellow, areolate and cracked, smooth. Isidia absent. Soralia scattered, somewhat immersed, 0.2–0.5 mm diam. Apothecia rare, verruciform, scattered, rarely confluent, concolorous with the thallus, slightly flattened-hemispherical, becoming constricted at the base, 0.5–1.0 mm diam. Ostioles inconspicuous, pale to dark yellowish brown, 1 per verruca. Ascospores 8 per ascus, irregularly uniseriate, ellipsoidal, rarely subfusiform, smooth, 50–75 (–90) × 25–37 µm. CHEMISTRY: Thallus K–, KC+ orange, C+ orange, Pd– or Pd+ weak yellow; containing thiophaninic acid (major), stictic acid (major), constictic acid (minor), 2-chloro-6-O-methyl-norlichexanthone (trace), ±lichexanthone (minor to trace) and 4-chloro-6-O-methylnorliche-xanthone (trace); rarely with additional norstictic acid (minor).
  A conspicuous, saxicolous species on exposed rock in eastern Qld and N.S.W.; often growing with P. subventosa; also in Papua New Guinea, Lord Howe Is., Norfolk Is. and New Zealand.  
  Archer (2004b)  

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

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