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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
Buellia xanthonica (Elix) Elix

Fl. Australia 57: 660 (2009)

Hafellia xanthonica Elix, Australas. Lichenol. 59: 36 (2006).

T: First North Rd, Wotto Nature Reserve, 21 km by road NE of Eneabba, W.A., 5 May 2004, J.A.Elix 28876; holo: PERTH; iso: CANB.

  Thallus corticolous or lignicolous, 1.0–2.5 cm wide, thin, continuous, smooth to indistinctly areolate, yellow-white to pale yellow-grey or yellow-green, uneven, occasionally verrucose. Prothallus appearing as a black line surrounding the thallus, or not apparent. Apothecia common, 0.4–1.5 mm wide, sessile; disc black, epruinose, plane or slightly convex; margin black, thin, usually persistent, becoming excluded in convex apothecia. Proper exciple dark brown to brown-black, the inner part somewhat paler. Epihymenium 10–20 μm thick, dark brown, K–. Hymenium 70–100 μm thick, inspersed with oil droplets. Hypothecium 60–80 μm thick, brown. Asci usually 8-spored, occasionally with fewer ascospores. Ascospores 1-septate, 14–35 × 6–15 μm, with moderately strong subapical but narrow septal wall thickenings; outer wall smooth. Pycnidia not seen.
CHEMISTRY: Thallus K–, C–, KC–, P–; containing 4,5-dichlorolichexanthone (major), ±brialmontin 1 (minor), ±brialmontin 2 (minor).
  Endemic on bark and wood in hinterland forest and woodland in W.A., N.S.W. and Tas.  
  Elix (2009l)  

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

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