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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
Parmelia signifera Nyl.
  Lich. Nov. Zel. 25 (1888); Parmelia saxatilis var. signifera (Nyl.) Müll.Arg., Bull. Soc. Roy. Bot. Belgique, Compt.-Rend., 31: 30 (1892). T: New Zealand, 1882, C.Knight s.n.; lecto: H-NYL; isolecto: BM, fide M.E.Hale, Smithsonian Contr. Bot. 66: 41 (1987).  
  Thallus loosely adnate to adnate, thick, rather firm to brittle, to 8–20 cm wide. Lobes crowded and imbricate, sublinear, 2–8 mm wide, sometimes becoming lobulate in thallus centre; lobules marginal, suberect, sometimes forming dense, pulvinate mats. Upper surface dark green-grey to brownish grey, shiny, maculate, smooth to rugose or foveolate, without soredia and isidia; pseudocyphellae laminal and marginal, effigurate, separate or partly fusing into a loose white network, appearing raised, extensively fissured with age. Lower surface rather densely rhizinate; rhizines simple to sparsely squarrosely branched, c. 1 mm long. Apothecia common, sessile to subpedicellate, 6–12 mm wide; disc concave becoming flattened, often radially split; thalline exciple heavily effigurate-pseudocyphellate. Ascospores 13–15 × 6–8 µm. Pycnidia common. Conidia bifusiform, 5–6.5 × 1 µm. CHEMISTRY: cortex K+ yellow; medulla K+ yellow then red, C-, P+ orange; containing atranorin, chloroatranorin, salazinic acid (major), consalazinic acid (minor) and ±lobaric acid (minor).
  The most common Parmelia in eastern Australia, occurring in montane areas (Qld, N.S.W., A.C.T., Vic. and Tas.); also occurs in Macquarie Is. and New Zealand. Grows on rock, rarely on soil or debris.  
  Elix (1994o)  

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

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