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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 torulosa var. aurescens (Motyka) G.N.Stevens
  Biblioth. Lichenol. 72: 109 (1999); Usnea aurescens Motyka, Usnea 2: 561 (1938). T: Cave Hill, Dunedin, Otago, New Zealand, J.S.Thomson (T245) M23; lecto: CHR, fide D.J.Galloway, Fl. New Zealand Lichens 603 (1985); isolecto: BM.  
  As var. torulosa, but... Thallus to 6 cm tall; branches 0.5–1.0 mm wide; apices tapered, slender, not blackened. Isidia sparse or eroded from pseudocyphellae, small, not black-tipped; pseudocyphellae round, well defined, often ±globose, evenly spaced along branches. CHEMISTRY: Cortex containing usnic acid. Medulla K–; containing barbatic acid (major), 4-O-demethylbarbatic acid (trace) and ±squamatic acid.
  This variety grows on dolerite, quartzite and granite rocks. It is rare in the mountains of south-eastern N.S.W., A.C.T. and Vic., but common in central and eastern Tas. Also in New Zealand.  
  Stevens (2004)  

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

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