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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
Menegazzia myriotrema (Müll.Arg.) P.James
  Fl. Australia 54: 313 (1992)
Parmelia myriotrema Müll.Arg., Bull. Herb. Boissier 4: 91 (1896). T: without precise locality, Tas., F.R.M.Wilson 1731; holo: G. ****Parmelia retipora Stirt., Trans. & Proc. New Zealand Inst. 32: 80 (1900); Menegazzia retipora (Stirt.) Bitter, Hedwigia 40: 172 (1901). T: without precise locality, Tas., Mrs Heywood McEwen 36; holo: BM.
  Thallus forming small rosettes or irregular patches, 3–8 cm wide, closely attached. Lobes radiating, flabellate, mostly to 1 mm wide, divergent, with obscure branching, contiguous or imbricate, hollow, green-grey, without isidia, maculae or soredia; margins smooth or notched; upper part of cavity pale or whitish, lower part grey or black. Perforations numerous, laminal, many per lobe, rounded, oval or sometimes irregularly level with surface, less than 1 mm wide, rather regular. Apothecia scattered, laminal, sessile, rounded, to 2 mm wide; disc matt or slightly roughened, epruinose, pale to dark red-brown; exciple often fissured, smooth to unevenly crenulate. Ascospores 1–2 per ascus, 45–60 × 25–32 µm; wall 3.5–4 µm thick. CHEMISTRY: cortex K+ yellow (atranorin); medulla K+ orange, KC+ orange, C-, P+ orange (stictic and cryptostictic acids, sometimes ?lecanoric acid but lacking constictic acid or menegazziaic acid).
  Occurs in Vic. and Tas., on bark; common and widespread on canopy twigs in rainforest, rare outside rainforest; endemic.  
  James & Galloway (1992)  

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

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