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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
Myelochroa degelii (Hale) Elix & Hale
  Mycotaxon 29: 240 (1987)
Parmelina degelii Hale, Smithsonian Contr. Bot. 33: 25 (1976). T: Cairns Cove, Qld, G.Degelius A-182; holo: herb. Degelius; iso: US.
  Thallus adnate, fragile, to 6–8 cm wide. Lobes subirregular, 2–3 mm wide; margins becoming lobulate-dissected; cilia irregularly dispersed but mostly in lobe axils, to 0.8 mm long. Upper surface pale greenish white, smooth to rugulose, shiny, without soredia; isidia sparse to moderately dense, erect, cylindrical at first, becoming procumbent, dorsiventral, flattened-expanded, to 0.6 mm long. Medulla pale yellow. Lower surface densely rhizinate; rhizines simple, black. Apothecia and pycnidia not seen. CHEMISTRY: cortex K+ yellow; medulla K-, C-, KC-, P-; containing atranorin, chloroatranorin, secalonic acid A, zeorin, leucotylic acid and unidentified secalonic acid pigments.
  Rare, endemic to north Qld. Grows on bark.  
  Elix (1994l)  

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

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