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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 subalpina G.N.Stevens
  Biblioth. Lichenol. 72: 100 (1999). T: L. Catani, Mt Buffalo, Vic., 12 Oct. 1990, G.N.Stevens 7159NS; holo: MEL; iso: BRI.  
  Thallus erect, to 6 cm tall, yellow-green, rarely pale green; branching sparse, subdichotomous to irregular; trunk pale or black, often with white annular cracks; branches terete, 1.0–1.5 mm wide, sometimes slightly inflated; apices slightly tapered; branchlets and fibrils sparse or absent; papillae sparse to dense. Isidia present; pseudocyphellae numerous, small, concave, not in bands, punctiform, round to effigurate; soralia absent. Cortex thick, glossy, somewhat waxy. Medulla arachnoid; axis 1/4–3/5 width of branch, hyaline. Apothecia common, few to moderately numerous, terminal or lateral, to 6 mm diam.; disc concave or plane; fibrils on margin sometimes long and branched; lower surface without fibrils. Ascospores c. 8 × 5 µm. CHEMISTRY: Cortex containing usnic acid. Medulla K–: containing squamatic acid, or psoromic acid, or barbatic acid, or no lichen substances detected.
  Endemic to eastern N.S.W., A.C.T. and Vic. at elevations above 1000 m and at lower elevations in Tas.; grows on Eucalyptus spp. and on acidic (granite) and basic (dolerite and basalt) rocks.  
  Stevens (2004)  

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

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