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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
Hypotrachyna revoluta (Flörke) Hale
  Smithsonian Contr. Bot. 25: 60 (1975); Parmelia revoluta Flörke, Deutsche Lichenen 1: 11 (1815). T: Germany, H.G.Flörke; lecto: FH-TUCK, fide M.E.Hale, loc. cit.  
  Thallus loosely adnate, orbicular, to 4–10 cm wide. Lobes separate or loosely imbricate, sublinear to subirregular, subdichotomously branched, rather short, 1–4 mm wide, often ±ascending at apices. Upper surface greenish grey, flat, shiny, smooth, minutely maculate, without pustules and isidia; soralia coarse to pustular, forming abraded patches towards lobe apices leaving bare blackish areas of medulla, heavily sorediate lobes becoming revolute. Medulla white. Lower surface subcanaliculate, sparsely rhizinate; rhizines sparingly dichotomously branched. Apothecia rare, sessile to subpedicellate, 2–6 mm wide; thalline exciple sorediate. Ascospores 10–14 × 6–8 µm. Pycnidia not seen. CHEMISTRY: cortex K+ yellow, UV-; medulla K-, C+ red, KC+ red, P-, UV-; containing atranorin, chloroatranorin, gyrophoric acid (major) and 5-O-methylhiascic acid (minor).
  Common in moister areas of W.A., S.A., N.S.W., A.C.T., Vic. and Tas.; a cosmopolitan species. Grows on bark and rock.  
  Elix (1994h)  

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

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