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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 spargenosa Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 322 (1986). T: south of Kingaroy, Qld, 17 June 1982, M.E.Hale 65004; holo: US.  
  Thallus foliose, loosely to moderately adnate, to c. 5 cm wide. Lobes densely imbricate to contiguous, flat, subirregular, irregularly branched, 1–2.5 mm wide; laciniae imbricate and ±entangled, 0.5–1 mm wide; apices crenulate, ±round. Upper surface yellow-green, shiny, emaculate, smooth, lacking soredia and isidia; lobe margins often black, particularly towards apices. Medulla white. Lower surface pale ivory to brown; rhizines sparse, often grouped subapically, simple, robust, concolorous. Apothecia sessile, 1–3 mm wide; disc shallowly concave, dark brown; thalline exciple thin, persistent, becoming ±undulating. Ascospores 8–10 × 5–6.5 µm. Pycnidia common. Conidia bifusiform, 5–7 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K-, C-, KC-, P-; containing usnic acid, exuviatic acid B and ±exuviatic acid A.
  Very rare and scattered, in lowland temperate or subarid areas (S.A., Qld and N.S.W.). Grows on rock.  
  Elix (1994z)  

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

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