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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 wilsonii Müll.Arg. subsp. wilsonii
  Bull. Herb. Boissier 1: 39 (1893). T: Upper Maffra, Gippsland,Vic., 1891, F.R.M.Wilson 362; holo: G; iso: MEL.  
  Thallus continuous or rimose to verruculose, yellowish grey to greenish grey, epruinose. Soredia absent. Prothallus whitish grey. Apothecia sessile, 0.5–1.2 mm diam.; disc blackish brown to dark red-brown, epruinose; margin concolorous with the thallus, thin, smooth, entire. Cortex hyaline, distinct, inspersed with small crystals, 10–20 µm thick laterally and basally. Amphithecium with large and small crystals; small crystals soluble in KOH (melacarpella-type). Parathecium hyaline, 15 µm thick, with numerous small crystals insoluble in KOH. Epihymenium reddish brown, c. 10–15 µm thick, K–, without crystals (glabrata-type). Hymenium, subhymenium and hypothecium hyaline. Paraphyses sparingly branched and slightly thickened apically. Ascospores broadly ellipsoidal, 8.5–12.5 × 6.0–8.0 µm. CHEMISTRY: Thallus and apothecial margin K+ yellow, C–, Pd+ yellow; containing usnic acid (major), atranorin (minor), chloroatranorin (minor) and two unidentified fatty acids.
  This common lichen is found on siliceous rocks in open to moderately shaded habitats in temperate to subtropical areas of south-eastern and eastern Australia. Occurs in eastern Qld, N.S.W., Vic. and Tas. Also in South America.  
  Lumbsch & Elix (2004)  

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

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