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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
Lecanora dispersa (Pers.) Sommerf.
  Suppl. Fl. Lapp. 96 (1826); Lichen dispersus Pers., Neue Ann. Bot. 1: 27 (1794). T: “Hab. freq. ad lapides calcarios” [country not known]; n.v.  
  Thallus immersed in the substratum or thin, superficial and scattered-granular, whitish grey to pale grey, epruinose. Soredia absent. Prothallus not visible. Apothecia sessile to slightly constricted at the base, 0.2–1.0 mm diam.; disc pinkish brown to olivaceous brown or pale yellowish to greenish grey, whitish grey-pruinose; margin whitish grey, ±whitish-pruinose, thin to thick, ±verrucose to crenulate. Cortex hyaline, distinct, gelatinous, inspersed with small crystals, 20–50 µm thick. Amphithecium lacking crystals, densely packed with algae; algal layer continuous below hymenium. Parathecium hyaline, lacking crystals. Epihymenium yellowish brown to red-brown, c. 10–15 µm thick, with numerous small crystals insoluble in KOH. Hymenium and subhymenium hyaline. Hypothecium hyaline to yellowish brown. Paraphyses sparingly branched and thickened apically. Ascospores ellipsoidal, 7.5–13.5 × 4.5–7.0 µm. CHEMISTRY: Thallus and apothecial margin K– or K+ yellowish, C–, Pd– or Pd+ yellow; containing 2,7-dichlorolichexanthone (major), 2,7-dichloro-3-O-methlynorlichexanthone (minor) and pannarin (minor).
  Occuring in all States and Territories except N.T. and Qld, L. dispersa is a cosmopolitan species and is known from all continents. This lichen is common on nutrient-rich substrata and grows on soil, rocks and the bark of various trees.  
  Lumbsch & Elix (2004)  

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

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