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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 baileyi (Stirt.) Zahlbr.
  Denkschr. Kaiserl. Akad. Wiss., Math.-Naturwiss. Kl. 83: 182 (1909); Eumitria baileyi Stirt., Scott. Naturalist (Perth) 6: 100 (1881). T: near Brisbane, Qld, F.M.Bailey 164; lecto: BM, fide R.W.Rogers, Austrobaileya 1: 503 (1982). ****Eumitria implicita Stirt., Scott. Naturalist (Perth)6: 100 (1881); Usnea implicita (Stirt.) Zahlbr., Cat. Lich. Univ. 6: 582 (1930). T: Funchal, Madeira, J.Payne s.n.; lecto: BM, fide R.W.Rogers & G.N.Stevens, Austral. Syst. Bot. 1: 357 (1988). ****Usnea barbata var. asperrima Müll.Arg., Flora 65: 299 (1882); U. percava f. asperrima (Müll.Arg.) J.Steiner, Verh. K.K. Zool.-Bot. Ges. Wien, B, 53: 231 (1903); Eumitria asperrima (Müll.Arg.) Vain., Ann. Acad. Sci. Fenn., ser. A, 6(7): 10 (1915). T: Illawarra, N.S.W., W.Kirton; holo: G; iso: MEL. ****Usnea barbata var. tasmanica Müll.Arg., Flora 65: 299 (1882); Eumitria tasmanica (Müll.Arg.) Vain., Ann. Acad. Sci. Fenn., Ser. A, 6(7): 10 (1915); Usnea tasmanica (Müll.Arg.) Zahlbr., Cat. Lich. Univ. 6: 594 (1930). T: Van Diemens Land [Tas.], 1878, de Franquer 31; holo: G. ****Eumitria formosa Stirt., Scott. Naturalist (Perth)6: 297 (1883); Usnea formosa (Stirt.) Zahlbr., Cat. Lich. Univ. 6: 575 (1930). T: Peak Ra., Qld, Statter s.n.;lecto:BM, fide R.W.Rogers, Austrobaileya 1: 503 (1982). ****Usnea barbata var. substrigosa Müll.Arg., Flora 72: 143 (1889); U. dasypogoides var. substrigosa (Müll.Arg.) Zahlbr., Cat. Lich. Univ. 6: 652 (1930). T: Clarence R., N.S.W., J.Wilcox; holo: G; iso: MEL. ****Usnea eizanensis Asahina, Lichens Japan III. Genus Usnea 42 (1956). T: District Mt Hiyei (eastern side), Prov. Omi, Japan, coll. unknown; holo: TNS. ****[Usnea poliotrix auct. non Kremp.: W.W.Watts, Proc. Linn. Soc. New South Wales, ser. 2, 28: 498–499 (1903)].  
  Thallus erect to subpendulous, 5–15 (–20) cm long, grey to greenish grey; branching subdichotomous to irregular; trunk usually black, rarely pale; branches terete or somewhat ridged, 1.0–1.5 mm wide; apices attenuate, straight or arcuate; fibrils sparse to dense on main branches, to 5 mm long. Isidia sparse to dense, solitary or clustered, papilla-like when immature, becoming cylindrical and easily dislodged, eroding to leave pseudocyphellae; pseudocyphellae punctiform, scattered; soralia absent. Cortex cracked, matt. Medulla dense, with a yellow, pink, red-brown, maroon or chocolate-brown layer around axis; axis hollow, 3/4 width of branch. Apothecia rare, terminal on short lateral branches; disc plane; margin and lower surface bearing fibrils. Ascospores 8–10 × 5–6 µm. CHEMISTRY: Cortex containing usnic acid. Medulla K+ red (difficult to see because of the pigment); containing eumitrin A, ±eumitrin B, norstictic acid (major), ±salazinic acid (minor or trace), connorstictic acid (trace), galbinic acid (trace) and hyposalazinic acid (trace); zeorin and secalonic acid A may also be present.
  Common in open forest, on the branches in rainforest canopies, on fence posts and on rock in Qld and N.S.W.; rare in Tas. Also in Lord Howe Is. and known from other tropical and warm-temperate regions of the world.  
  Stevens (2004)  

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

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