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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
Parmelinopsis horrescens (Taylor) Elix & Hale
  Mycotaxon 29: 242 (1987)
Parmelia horrescens Taylor in J.T.Mackay, Fl. Hibern. 2: 144 (1836); Parmelina horrescens (Taylor) Hale, Phytologia 28: 482 (1974); Hypotrachyna horrescens (Taylor) Krog & Swinscow, Lichenologist 19: 420 (1987). T: Dunkerron Mtns, Kerry, Ireland, Apr. 1834, T.Taylor; lecto: FH-TAYL, fide M.E.Hale, Smithsonian Contr. Bot. 33: 31 (1976). *****Parmelia dissecta Nyl., Flora 65: 451 (1882); Parmelina dissecta (Nyl.) Hale, Phytologia 28: 482 (1974). T: Fontainebleau, France, W.Nylander s.n.: lecto: H-NYL 35131; isolecto: PC, n.v., fide M.E.Hale, Smithsonian Contr. Bot. 33: 25 (1976).
  Thallus adnate to tightly adnate, to 2–6 cm wide. Lobes often crowded and imbricate, linear to sublinear, dichotomously branched, 0.5–3 mm wide, becoming lobulate; cilia ±evenly distributed, simple, 0.3–0.8 mm long. Upper surface whitish to greenish grey, shiny, emaculate, smooth, without soredia and pustules; isidia dense, cylindrical or slightly flattened and becoming lobulate-coralloid, apically spinulose or shortly ciliate. Medulla white. Lower surface black, with a narrow, brown, erhizinate marginal zone; rhizines moderately dense, simple, rarely squarrose or dichotomously branched, black. Apothecia rare, sessile, 2–4 mm wide; disc concave, split at maturity; thalline exciple isidiate. Ascospores 16–18 × 10–12 µm. Pycnidia rare. Conidia cylindrical, 3–4 × 0.5 µm. CHEMISTRY: cortex K+ yellow; medulla K-, C-, KC+ rose or red, P-; containing atranorin, chloroatranorin, 3-methoxy-2,4-di-O-methylgyrophoric acid (major), gyrophoric acid (minor), 2,4-di-O-methylgyrophoric acid (minor), 5-O-methylhiascic acid (minor), umbilicaric acid (minor), hiascic acid (trace), 2,4,5-tri-O-methylhiascic acid (trace) and 4,5-di-O-methylhiascic acid (trace).
  Common on rock and bark in eastern Australia (Qld, N.S.W., Vic. and Tas.). This pantemperate and montane pantropical species also occurs in Africa, Europe, North and South America, Papua New Guinea and New Zealand.  
  Elix (1994r)  

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

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