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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 sanguinea Swinscow & Krog
  Lichenologist 11: 243 (1979). T: Juniper Hill, Arusha Natl Park, Arusha District, Northern Province, Tanzania, 1974, T.D.V.Swinscow & H.Krog T3/16; holo: BM.  
  Thallus erect to subpendulous, to 9 cm long, mottled green and red; branching subdichotomous; base black; trunk reddish; branches terete, to 1 mm wide; apices tapered; without branchlets; fibrils dense, often broken, 3–5 mm long; papillae dense, with or without pseudocyphellae at tips. Isidia absent; pseudocyphellae absent from cortex; soralia absent. Cortex glossy, cracked in places. Medulla dense; axis 1/2–2/3 width of branch, hyaline. Apothecia numerous, terminal, to 5.5 mm diam.; disc concave or plane; margin bearing dense or sparse fibrils; lower surface usually with papillae and short fibrils, rarely smooth. Ascospores 7–8 × 5–6 µm. CHEMISTRY: Cortex containing usnic acid. Medulla K+ yellow → red; containing salazinic acid (major), galbinic acid (trace) and norstictic acid (minor).
  Occurs on bark in only a few localities in montane, subtropical rainforest in south-eastern Qld and north-eastern N.S.W. Also in Tanzania.  
  Stevens (2004)  

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

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