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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 congesta (Kurok. & Filson) Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 212 (1986); Parmelia congesta Kurok. & Filson, Bull. Natl Sci. Mus., ser. B, 1: 36 (1975). T: Podinna Rock, 24.1 km north of Minnipa, S.A., 25 Oct. 1970, R.B.Filson 11901c; holo: MEL.  
  Thallus foliose, adnate, to 7–10 cm wide. Lobes mostly imbricate, ±contiguous, flat, not ascending, irregular, irregularly branched, not constricted, 0.7–3 (–7) mm wide. Upper surface yellow to yellow-green, slightly glossy or dull, emaculate, becoming rugose and ridged in older, central part of thallus, lacking soredia and isidia; commonly black along lobe margins. Medulla white. Lower surface rugulose or not, black; rhizines sparse, simple, robust, c. 0.2 mm long, black. Apothecia subpedicellate, 3–9 mm wide; disc concave, red-brown to black-brown; thalline exciple involute and undulating, ultimately developing subradiating fissures. Ascospores 6–8 × 4–5.5 µm. Pycnidia common. Conidia bifusiform, 5–6 × 0.5 µm. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then dark red, C-, P+ yellow-orange; containing usnic acid, norstictic acid, connorstictic acid (trace) and ±salazinic acid (trace).
  Rare in subarid areas but relatively common on exposed, subalpine rock. Scattered in dry areas of W.A., S.A., Qld and N.S.W. and common in alpine and subalpine areas of N.S.W., A.C.T., Vic. and Tas.; also on the South Is. of New Zealand. Grows on rock.  
  Elix (1994z)  

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

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