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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 defectum (Hale) Hale
  Phytologia 28: 335 (1974);Parmelia defecta Hale, Contr. U.S. Natl. Herb. 36: 244-245 (1965).  Type: South Africa, Natal, Bergville, Cathedral Park area, 3 November 1953, O.Almborn 8934; holo: LU.  
  Thallus loosely adnate to adnate, coriaceous, 5-10 cm wide.  Lobes imbricate to centrally contorted, irregular to sublinear, rounded, (3-)5-10 mm wide; margins subascending, sinuate, entire to jagged or ±incised, eciliate.  Upper surface pale grey or pale grey-brown, dull, smooth at first then becoming rugose and developing cracks centrally, sorediate; soralia marginal to subcapitate or subpustulate; developing into granular soredia.  Medulla white.  Lower surface black, rhizinate with a naked, brown zone at lobe margin, 3-4 mm wide; rhizines black, simple, sparse to moderately dense.  Apothecia not seen.  Pycnidia laminal at lobe margins, sparse.  Conidia filiform, 14-17 x 1-1.5 µm. CHEMISTRY: cortex K+ yellow; medulla K-, C+ red, P-; containing atranorin, chloroatranorin, lecanoric acid (major) and trace unknowns.
  Parmotrema defectum is a saxicolous species, previously reported from East and South Africa (Hale, 1965).  On Lord Howe Island it was collected on exposed basalt outcrops.  
  Louwhoff & Elix (1998)  

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

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