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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 trirosea Elix
  Mycotaxon 47: 124 (1993). T: Gudgenby River Gorge, 4.5 km south of Tharwa, A.C.T., 35°34'S, 149°04'E, 620 m, 12 Apr. 1982, J.A.Elix 10165; holo: CANB; iso: CANB, MEL.  
  Thallus foliose, very loosely adnate, to 6–9 cm wide. Lobes moderately imbricate, flat, linear-elongate, subdichotomously branched, divaricate in places, becoming suberect and exposing lower surface, 0.5–1 mm wide. Upper surface yellow to yellow-green, blackening with age, shiny, emaculate, smooth, lacking soredia and isidia; lobe margins black. Medulla white. Lower surface rugose, jet black; rhizines absent or very sparse, simple, robust, short. Apothecia sessile, 1–10 mm wide; disc concave, chestnut-brown, darkening; thalline exciple entire, thick, involute, becoming subentire and thin. Ascospores 6–10 × 3.5–5.5 µm. Pycnidia numerous. Conidia bifusiform, 5–7 × 1 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then pale reddish, C-, KC-, P-; containing usnic acid, hypostictic acid (major), hyposalazinic acid (minor) and hypoconstictic acid (minor).
  Scattered, endemic, on exposed, acidic rock in areas of moderate rainfall in coastal and hinterland areas of south-eastern Australia (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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