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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 blackdownensis Elix & J.Johnst.
  Mycotaxon 29: 360 (1987). T: north of Horseshoe Lookout, Blackdown Tableland, Leichhardt district, Qld, 27 Jan. 1983, D.Verdon 5243; holo: CANB.  
  Thallus small-foliose, adnate to tightly adnate, to 1–2 cm wide. Lobes barely imbricate or not, mostly widely separate, flat, subirregular to sublinear-elongate, irregularly branched, 0.5–1 mm wide. Upper surface yellow-green, shiny at least near lobe apices, emaculate, becoming transversely or irregularly cracked, without soredia; lobe margins smooth; isidia in thallus centre, cylindrical, simple, apices syncorticate. Medulla white. Lower surface pale tan to light brown; lobe apices darker, shiny; rhizines sparse to moderately dense, simple, short, concolorous. Apothecia and pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P-; containing usnic acid, diffractaic acid (major), 4-O-demethylbarbatic acid (minor) and 3-a-hydroxybarbatic acid (trace).
  Rare, endemic, known from Qld. Grows on rock.  
  Elix (1994z)  

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

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