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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 xanthomelanoides Elix & J.Johnst.
  Mycotaxon 33: 363 (1988). T: west of Springton along the High Eden road, Mt Lofty Ranges, S.A., 20 May 1976, J.A.Elix 2251; holo: CANB; iso: MEL.  
  Thallus small-foliose to subcrustose, very tightly adnate, to 2–3 cm wide. Lobes sparingly imbricate, ±contiguous to widely separate, flat, linear-elongate, subdichotomously branched, 0.2–0.8 (–1.2) mm wide. Upper surface yellow-green, darkening to deep olive-brown or blackish in older lobes, dull, emaculate, lacking soredia and isidia; older lobes often developing transverse cracks, ultimately becoming areolate. Medulla white. Lower surface pale tan to brown, darker at lobe apices; rhizines sparse, simple, rudimentary, robust, short (c. 0.1 mm), concolorous. Apothecia subpedicellate, to 1 mm wide; disc weakly concave, black; thalline exciple smooth, narrow, entire, ±crenulate. Ascospores 8–9 × 6–7 µm. Pycnidia common. Conidia bifusiform to elongate-bifusiform, 5–9 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow, C-, P+ orange; containing usnic acid, stictic acid (major), constictic acid (minor), norstictic acid (minor) and cryptostictic acid (trace).
  Rare, endemic, on rock in temperate areas of southern Australia (W.A., S.A. and N.S.W.).  
  Elix (1994z)  

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

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