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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 isidiosa (Müll.Arg.) Elix & J.Johnst.
  in J.A.Elix, J.Johnston & P.M.Armstrong, Bull. Brit. Mus. (Nat. Hist.), Bot. 15: 274 (1986). Parmelia conspersa var. stenophylla f. isidiosa Müll.Arg., Hedwigia 31: 193 (1892); Parmelia isidiosa (Müll.Arg.) Hale, Bull. Torrey Bot. Club 82: 14 (1955). T: Victoria Desert, W.A., R.Helms 98; lecto: G, fide M.E.Hale, Smithsonian Contr. Bot. 74: 132 (1990). *****Parmelia refringens Kurok. & Filson, Bull. Natl Sci. Mus., ser. B, 1: 43 (1975); Xanthoparmelia refringens (Kurok. & Filson) Hale, Mycotaxon 20: 79 (1984). T: Wynbring Rocks, 1.2 km north of Wynbring on Transcontinental Railway line, S.A., 28 Oct. 1970, R.B.Filson 11940 p.p. min.; holo: MEL. *****[Parmelia conspersa var. isidiosa auct. non Nyl. [= Xanthoparmelia tinctina (Maheu & A.Gillet) Hale]: W.A.Weber & C.M.Wetmore, Beih. Nova Hedwigia 41: 71 (1972)]. *****[Parmelia tinctina auct. non Maheu & A.Gillet [= Xanthoparmelia tinctina (Maheu & A.Gillet) Hale]: R.B.Filson, Checklist of Australian Lichens 1st edn, 78 (1983)].  
  Thallus small-foliose to subcrustose, tightly adnate, to 5 cm wide. Lobes imbricate or not, flat, irregular, irregularly branched, 0.8–1.5 mm wide. Upper surface pale yellow to yellow-green, dull, emaculate, without soredia; older lobes irregularly cracked and becoming areolate; isidia moderately dense, globose then cylindrical, commonly branched; isidia apices epicorticate, becoming inflated but rarely erumpent, not sorediose. Medulla white. Lower surface black; rhizines sparse, simple, 0.3–0.8 mm long, black. Apothecia rare, subpedicellate, to 6 mm wide; disc deeply concave, dark brown; thalline exciple thick, involute, lacerate, ±isidiate. Ascospores 7–10 × 4–6 µm. Pycnidia not seen. CHEMISTRY: cortex K-, UV-; medulla K+ yellow then dark red, C-, KC+ red, P+ orange; containing usnic acid, salazinic acid (major) and consalazinic acid.
  Common and widespread on rock in arid and subarid areas of W.A., N.T., 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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