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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 luminosa (Elix) Hale
  Mycotaxon 20: 79 (1984); Parmelia luminosa Elix, Austral. J. Bot. 29: 357 (1981). T: Gudgenby River Gorge, 4.5 km south of Tharwa, A.C.T., 26 June 1979, J.A.Elix 6118; holo: MEL; iso: CANB. ***** [Parmelia dichromatica auct. non Hale [= Xanthoparmelia dichromatica (Hale) Hale]: R.B.Filson, Checklist of Australian Lichens 1st edn, 67 (1983)].  
  Thallus foliose, adnate, to 6–10 cm wide. Lobes imbricate, contiguous or not, flat, subirregular, irregularly branched, 2–5 (–8) mm wide; apices crenulate, ±round. Upper surface bright yellow-green, fading after storage, sometimes becoming deep olive-green, shiny, emaculate, becoming rugose and cracked, lacking soredia and isidia. Medulla mostly white; lower medulla yellow-orange to red-orange. Lower surface black; brown or often intense red-brown or orange-brown near lobe apices; rhizines moderately dense, simple, robust, concolorous. Apothecia sessile, 2–5 mm wide; disc concave, red-brown to dark brown; thalline exciple involute, becoming undulating and developing irregular cracks. Ascospores 7–10 × 4.5–5.5 µm. Pycnidia numerous. Conidia bifusiform, 6–7 × 1 µm. CHEMISTRY: cortex K-, UV-; white medulla K+ yellow then dark red, C-, KC-, P+ intense yellow; pigmented medulla K+ violet; containing skyrin (in pigmented medulla), usnic acid, salazinic acid (major) and consalazinic acid (minor).
  Relatively common, endemic, scattered on rock in temperate upland areas of southern Australia (W.A., S.A., N.S.W. and A.C.T.).  
  Elix (1994z)  

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

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