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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 nonreagens Elix & J.Johnst.
  Mycotaxon 29: 365 (1987). T: Mt Farrenden, SSW of Charters Towers, Qld, 22 June 1986, J.A.Elix 20562 & H.Streimann; holo: CANB.  
  Thallus small-foliose to subcrustose, very tightly adnate, to 2–4 cm wide. Lobes not imbricate, contiguous, flat, subirregular to linear-elongate, irregularly branched, (0.2–) 0.5–1 mm wide. Upper surface yellow-green, darkening to deep olive-brown or blackish in older lobes, dull, emaculate, without soredia; older lobes becoming cracked and often forming areolae 0.2–0.5 mm wide in thallus centre; areolae appearing as fragmentary lobules in poorly developed specimens; isidia dense, cylindrical, simple or sparingly branched, fragile, small (0.1–0.2 mm); isidia apices syncorticate, solid, brown. Medulla white. Lower surface pale tan; rhizines sparse, simple, robust, concolorous. Apothecia rare, subpedicellate, to 4 mm wide; disc weakly concave, becoming flat or ±undulating, brown to dark brown; thalline exciple thin, entire, persistent, densely isidiate. Ascospores 7–9 × 4–5 µm. Pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P-; containing usnic acid, scabrosin 4,4'-dibutyrate, scabrosin 4-acetate 4'-butyrate, scabrosin 4-acetate 4'-hexanoate and ±scabrosin 4,4'-diacetate.
  Relatively rare, endemic, on exposed rock in hinterland regions of S.A., Qld and N.S.W.  
  Elix (1994z)  

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

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