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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
Pseudocyphellaria argyracea (Delise) Vain.
  Hedwigia 37: 35 (1898); Sticta argyracea Delise, Mém. Soc. Linn. Calvados 2: 91 ('1822') [1825]; T: "sur des troncs ou les rochers mousses des hautes montagnes", Réunion, ?J.B.G.G.M.Bory de St-Vincent; lecto: PC-LENORMAND, fide D.J.Galloway & P.W.James, Nova Hedwigia 42: 429 (1986).  
  Thallus rosette-forming to irregularly spreading, loosely attached, 1–5 (–10) cm wide. Lobes irregularly laciniate to rounded, discrete to ±imbricate, 1–3 cm long, 3–10 (–20) mm wide; lobe margins entire to minutely crenate-incised, delicately isidiate. Upper surface pale grey-brown when dry, slatey blue-grey to blue-black when wet, plane to wrinkled, sorediate, isidiate, without maculae or phyllidia; pseudocyphellae laminal, few to numerous, ±evenly spaced, round to irregular, ulcerose, becoming sorediate, to 3 mm diam.; isidia minute, terete, simple to coralloid, clustered at margins of pseudocyphellae and at apices and margins of lobes. Medulla white. Photobiont Nostoc. Lower surface pale brownish, densely tomentose from margins to centre. Pseudocyphellae rather rare, white, scattered, irregular, best seen at margins. Apothecia not seen in Australian material. CHEMISTRY: Methyl gyrophorate (±), gyrophoric acid (±), 7β-acetoxyhopane-22-ol, hopane-7β,22-diol (trace) and hopane 15α,22-diol.
  Occurs in eastern Qld and Tas., on trees and shrubs in shaded forest habitats; also on rocks, soil and moss, at altitudes of 150–1200 m. Widespread in the Palaeotropics from East Africa, to India and northwards to Japan and southwards to New Zealand; also in southern South America and in the islands of the Pacific Ocean.  
  Galloway et al. (2001)  

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

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