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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
Parmotrema robustum (Degel.) Hale
  Phytologia 28: 338 (1974);
Parmelia robusta Degel., Göteborgs Kungl. Vetensk. Samhälles Handl., Ser. B, Mat. Naturvetensk. Skr., ser. 6, 1: 33 (1941). T: Foret [Forêt] de Crannou, Finistere [Finistère], France, 1898, C.Picquenard s.n.; holo: PC, n.v., fide M.E.Hale, Contr. U.S. Natl Herb. 36: 245 (1965).
  Thallus loosely adnate, membranaceous, to 10–20 cm wide. Lobes rotund, 10–15 mm wide; margins entire, ciliate; cilia sparse, 0.5–1.5 mm long, sometimes only sparsely developed and only in lobe axils. Upper surface grey, smooth, dull, faintly maculate at margins, becoming reticulate-cracked centrally with age, without isidia; soralia marginal, short, linear on small incised marginal laciniae, sorediate laciniae becoming convolute; soredia granular. Medulla white. Lower surface black, with a wide, flat, erhizinate marginal zone; rhizines sparse, in centre of thallus, simple, black. Apothecia rare, pedicellate, 3–5 mm wide; disc imperforate; thalline exciple sorediate, faintly maculate. Ascospores 18–22 × 8–10 µm. Pycnidia not seen. CHEMISTRY: cortex K+ yellow; medulla K+ dingy yellow becoming dirty brown, C-, P+ orange-red; containing atranorin, chloroatranorin, protocetraric acid (major) and with or without unidentified fatty acid.
  A scattered species on bark of trees in temperate rainforests of eastern Australia (Qld, N.S.W. and Vic.); also known from southern Europe, the Canary Is. and New Zealand.  
  Elix (1994t)  

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

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