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 angulata Ach. | ||
| Syn. Meth. Lich. 307 (1814). T: “Amer. Septentr.” [North America], Mühlenburg 22-2; holo: H–ACH 1880 (photo seen). ****Usnea undulata Stirt., Scott. Naturalist (Perth) 7: 75 (1883), nom. illeg., non U. undulata Stirt., Scott. Naturalist (Perth)6: 104 (1881). ****Usnea torquescens Stirt., Trans. & Proc. New Zealand Inst. 30: 391 (1898). T: Bulli, Illawarra, N.S.W., 1882, W.Kirton s.n.; lecto: BM, fide R.W.Rogers, Austrobaileya 1: 509 (1982). | ||
| Thallus pendulous, to 100 cm long, grey-green, moss-green or pale green; branching subdichotomous; trunk pale; branches 5-sided, 0.5–1.0 mm wide, ridged, alate, with surfaces cracked into uneven plates; secondary branches subparallel, elongate; apices tapered; branchlets sometimes arising from secondary branches, to 2 cm long; fibrils dense on all branches, perpendicular, pectinate, to 10 mm long; papillae absent. Isidia usually absent; pseudocyphellae absent or present on fibrils; soralia absent. Cortex thin, uneven, matt. Medulla thin, dense; axis 3/4 width of branch, hyaline. Apothecia uncommon, lateral or terminal on lateral branches, 2–5 mm diam.; disc concave; margin with few fibrils; lower surface smooth. Ascospores 6–8 (–9) × 5 µm. CHEMISTRY: Cortex containing usnic acid. Medulla K+ yellow → orange or red; containing norstictic acid (major), salazinic acid (minor), consalazinic acid (trace) and connorstictic acid (trace). |  |
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| Occurs in moist, open forest and in rainforest canopies in subtropical to temperate Qld, N.S.W., Vic. and Tas. An apparently disjunct population is known from the Atherton Tableland, north-eastern Qld. Also in Norfolk Is., New Zealand, North, Central and South America and Japan. | ||
| Stevens (2004) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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