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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
Parmotrema ultralucens (Krog) Hale
  Mycotaxon 1: 108 (1974);
Parmelia ultralucens Krog, Bryologist 77: 253 (1974). T: Dowdell's Knob, Harris Co., Georgia, U.S.A., 1965, H.Krog s.n.; holo: O, n.v., fide H.Krog, loc. cit. [Parmelia subcrinita auct. non Nyl.: R.B.Filson, Checklist of Australian Lichens 2nd edn, 98 (1986)].
  Thallus loosely adnate, coriaceous, to 10–20 cm wide. Lobes rounded to subirregular, 8–15 mm wide; margins crenate; cilia 0.5–2 mm long. Upper surface pale grey, dull to shiny, emaculate, becoming irregularly cracked in older parts, without soredia; isidia laminal, moderately dense, cylindrical, simple to coralloid-branched, often ciliate apically, brown-tipped. Medulla white. Lower surface black, with a broad, brown, erhizinate marginal zone; rhizines dense, simple, of varying length. Apothecia rare, pedicellate, 3–8 mm wide; disc imperforate; thalline exciple rugose, isidiate. Ascospores 15–17 × 10–12 µm. Pycnidia not seen. CHEMISTRY: cortex K+ yellow; medulla K+ yellow then red, C-, P+ orange, UV+ bright yellow; containing atranorin, chloroatranorin, lichexanthone and salazinic acid.
  A rare species in tropical north Qld; also known from East Africa and North and Central America. Grows on bark and rock.  
  Elix (1994t)  

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

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