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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 laevigata (Sm.) Hale
  Smithsonian Contr. Bot. 25: 44 (1975); Lichen laevigatus Sm., Engl. Bot. 26: pl. 1852 (1808); Parmelia laevigata (Sm.) Ach., Syn. Meth. Lich. 212 (1814). T: Anglesey, Caernarvonshire [Gwynedd], Wales, Davies s.n.; lecto: LINN, n.v., fide M.E.Hale, loc. cit.  
  Thallus loosely adnate to adnate, to 3–10 cm wide. Lobes often crowded, linear, dichotomously to subdichotomously branched, 1–6 mm wide, margins entire. Upper surface whitish grey or pale greenish grey, flat, dull, faintly maculate, continuous, without pustules and isidia; soredia in apical or subapical, capitate soralia, granular, grey or blackened. Medulla white. Lower surface densely rhizinate; rhizines shiny, richly dichotomously branched, often projecting beyond the margins. Apothecia and pycnidia not seen. CHEMISTRY: cortex K+ yellow, UV-; medulla K-, C-, KC+ orange, P-, UV-; containing atranorin, chloroatranorin, barbatic acid (major), 4-O-demethylbarbatic acid (submajor), obtusatic acid (trace) and norobtusatic acid (trace).
  Rare in Tas.; also known from New Zealand, Europe, North and South America. Grows on trees.  
  Elix (1994h)  

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

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