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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 acromelana Stirt.
  Trans. & Proc. New Zealand Inst. 30: 388 (1898); Neuropogon acromelanus (Stirt.) I.M.Lamb, J. Linn. Soc., Bot. 52: 218 (1939). T: Selwyn Gorge, New Zealand, 1894, T.W.N.Beckett L11; holo: BM. ****Neuropogon acromelanus var. decipiens I.M.Lamb, J. Linn. Soc., Bot. 52: 219 (1939). T: summit of Table Mountain [Mt Wellington], Tas., 1802–1805, R.Brown 523; holo: BM.  
  Thallus erect, fasciculate, to 5 cm tall, yellow-green or yellow, purplish black towards branch apices; branching subdichotomous, often dense; trunk black or pale; branches usually c. 1 mm wide, rarely less, with black-edged annulations on main branches; apices not hair-like, black; fibrils few or absent; papillae absent. Isidia absent; pseudoisidia rare; soralia numerous along branches, clustered especially at apices, convex-globose, pulverulent; soredia granular. Cortex waxy, smooth, subfaveolate. Medulla compact; axis thick, 2/3–3/4 total width of branch. Apothecia not seen. CHEMISTRY: Cortex containing usnic acid. Medulla K+ yellow → red; containing norstictic and salazinic acids, ±protocetraric acid; or medulla K–; containing psoromic, conpsoromic and 2’-O-demethylpsoromic acids; or medulla K–; not containing lichen substances.
  Known from one locality in Vic., more common in Tas.; grows on rock. Also in New Zealand, South America and the Antarctic Peninsula.  
  Stevens (2004)  

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

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