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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
Xanthoparmelia tropica (Elix & J.Johnst.) Elix
  Mycotaxon 87: 402 (2003)
Paraparmelia tropica Elix & J.Johnst., Mycotaxon 32: 412 (1988). T: Mt Leswell, S of Cooktown, Qld, 5 July 1984, J.A.Elix 17364 & H.Streimann; holo: CANB.
  Thallus small-foliose, tightly adnate, to 5 cm wide. Lobes imbricate, crowded, irregular, subdichotomously branched, 1–2 mm wide; apices subrotund. Upper surface pale grey, flat, shiny towards lobe apices, becoming dull, emaculate, smooth, without soredia; lobe margins blackened at apices; isidia dense in thallus centre, scattered on marginal lobes, globose then elongating, inflated especially near base, moderately branched, rarely becoming coralloid, to 2 mm tall; isidia apices brown-black, syncorticate, intact. Lower surface shiny, smooth, black-brown to black, chocolate-brown at lobe apices; rhizines very sparse, simple, tufted or not, robust, concolorous or darkening. Apothecia and pycnidia not seen. CHEMISTRY: cortex K+ yellow; medulla K+ pale yellow-brown, C-, P+ red-orange; containing atranorin and protocetraric acid (major).
  A rare endemic species known only from the type locality in north Qld.  
  Elix (1994n)  

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

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