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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 articulata (L.) Hoffm.
  Deutschl. Fl. 2: 133 (1796); Lichen articulata L., Sp. Pl. 2: 1156 (1753). T: England, Burnley s.n., Herb. Sherard; lecto: OXF, n.v., fide T.D.V.Swinscow & H.Krog, Norweg. J. Bot. 23: 262 (1976). ****Usnea contexta Motyka, Usnea 2: 436 (1937). T: Mt Maungatua, Otago, New Zealand, 1933, J.S.Thomson s.n.; holo: Herb. J.Motyka; iso: CHR. ****Usnea capillacea Motyka, Usnea 2: 438 (1937). T: Saddle Hill, Otago, New Zealand, 1933, J.S.Thomson s.n.; holo: Herb. J.Motyka; iso: CHR.  
  Thallus pendulous or decumbent, to 15 cm long, pale green or pale stramineous; branching dichotomous; trunk often absent in decumbent material, pale; branches terete, 0.4–1.0 mm wide, with or without inflation, articulated, fusiform; joints sometimes bordered by white rings in non-inflated thalli; apices tapered, hair-like; branchlets smooth, entire, fine, thread-like. Isidia, papillae, pseudocyphellae and soralia absent. Cortex smooth, glossy to matt, occasionally foveolate. Medulla sparse, arachnoid; axis c. 1/5 width of branch, hyaline. Apothecia rare. CHEMISTRY: Cortex containing usnic acid. Medulla K–; containing fumarprotocetraric acid (major), protocetraric acid (trace), succinprotocetraric acid (trace) and conprotocetraric acid (trace), or lacking lichen substances.
  Grows entangled in low vegetation, or hanging from Nothofagus branches in subalpine areas; rare in N.S.W. and Vic., but common on shrubs and trees in the mountains of Tas. Also in Macquarie Is., New Zealand, Europe, Africa, India and SE Asia.  
  Stevens (2004)  

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

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