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. |  |
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| 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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