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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
Heterodea muelleri (Hampe) Nyl.
  Bull. Soc. Linn. Normandie 2(2): 47 (1867); Sticta muelleri Hampe, Linnaea 25: 711 (1852). T: Mt Lofty Ranges, S.A., 1847, F.Mueller; holo: MEL.  
  Thallus to 10 cm wide and 4 cm tall, foliose, becoming erect or spreading, irregular. Lobes 6–10 mm wide, ascending, recurved at margins. Upper surface dull to slightly shining, yellow-green to yellow-brown. Lower surface with dense brown to black rhizines; sometimes pale with a network of dark veins, sometimes black with paler depressions or spots, sometimes wholly black. Apothecia to 1 mm wide, on lobe margins, pale reddish brown to dark reddish brown; exciple not prominent; hypothecium hyaline; hymenium including pale brown epithecium to 35 µm tall; paraphyses to 1.5 mm wide, simple. Ascospores 10–12 × 4–5 µm, ellipsoidal. Pycnidia to 150 µm wide. Conidia 6–8 × 1 µm. CHEMISTRY: Thallus KC+ yellow; medulla K-, C-, CK+ yellow, KC-, P-; hymenium I+ intense blue; asci I+ blue. Usnic acid present in cortex; diffractaic acid present in medulla.
  Occurs in all States and Terrirories of Australia, except the N.T.; also in Lord Howe Is., the North Island of New Zealand and in New Caledonia. Commonly grows loosely on the ground among grasses and litter, occasionally on damp logs or tree bases in forests.  
  Filson (1992e)  

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

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