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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 donneri Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 231 (1986). T: south-west corner, hundred of Warrow, south-eastern end of Marble Ra., north-west of Port Lincoln, Eyre Peninsula, S.A., 25 Aug. 1967, N.N.Donner 2086; holo: AD.  
  Thallus small-foliose to subcrustose, very tightly adnate, to 2–4 cm wide. Lobes not imbricate, contiguous or widely separate, flat, sublinear, dichotomously branched, 0.2–0.8 (–1) mm wide. Upper surface yellow-green to yellow, darkening to deep olive-brown or blackish in older lobes, dull, emaculate, lacking soredia and isidia; becoming cracked and often forming areolae 0.2–0.5 mm wide in thallus centre. Medulla white. Lower surface mainly black, partly dark-brown; rhizines dense, simple, black or part of lower surface adhering directly to substratum. Apothecia common, subpedicellate to sessile, 0.3–1 mm wide; disc concave, black; thalline exciple smooth, narrow, entire, ±crenulate. Ascospores 7–11 × 5–6 µm. Pycnidia rare. Conidia bifusiform, 5–6 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then dark red, C-, P+ yellow; containing usnic acid, barbatic acid (major), norstictic acid (major), connorstictic acid (minor), ±hyposalazinic acid (trace) and with or without unidentified compounds (trace).
  Very rare, endemic, on exposed acidic rocks in hinterland ranges of south-western W.A. and Eyre Peninsula (S.A.).  
  Elix (1994z)  

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

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