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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
Usnea bicolorata Motyka var. australiensis G.N.Stevens
  Biblioth. Lichenol. 72: 32 (1999). T: 7 km SE of Millaa Millaa, Atherton Tableland, Qld, 1988, G.N.Stevens 5403; holo: MEL; iso: BRI.  
  Thallus shrubby, erect to subpendulous or decumbent, to 10 (–17) cm long, pale green with a pink-orange tinge; branching subdichotomous to irregular; trunk with or without annular cracks, pale greenish or black; branches terete, slender, to 1 mm wide; apices tapered; branchlets few to numerous, bearing pseudocyphellae; fibrils mainly in basal part, sparse to dense, to 3 mm long. Isidia sparse or rather dense, in pseudocyphellae; pseudocyphellae numerous, large and conspicuous towards apices; papillae sparse to dense; soralia absent. Cortex glossy. Medulla dense, narrow, with subcortical orange-red pigment; axis 3/5 width of branch, hyaline. Apothecia rare. CHEMISTRY: Cortex containing usnic acid. Medulla K+ yellow → orange-red; containing salazinic acid (minor), galbinic acid (major), norstictic acid (minor), connorstictic acid (trace) and consalazinic acid (trace).
  An uncommon endemic on bark and fence posts in open, montane forest and rainforest in eastern Qld.  
  Stevens (2004)  

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

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