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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 elongata P.James
  Fl. Australia 54: 312 (1992)
T: W shore of Lake Dobson, Mt Field Natl Park, Tas., 6 Mar. 1981, L.Tibell 11139; holo: MEL; iso: UPS.
  Thallus appressed, sometimes lobe tips ±ascending, to 5 cm diam. Lobes numerous, mostly contiguous or imbricate, inflated, convex to subterete, not compressed, sausage-shaped, to 2 cm long, 2–3 mm wide, often with irregular toe-like or extended laterals, narrowing at base, without soredia, pale grey or blackening; margins and below blackened; apices often discrete, matt, without blotches, smooth to finely rugose, suffused brownish. Cavity blackened. Perforations scattered on main lobes, more common on lateral lobes near base, to 1.5 mm wide, often elevated but without a collar, rounded or oval, often with a thin, black rim. Apothecia frequent, often clustered, discrete or contiguous, sessile to subpedicellate; exciple smooth. Asci 2-spored. Ascospores 53–65 × 30–40 µm; wall 4–4.5 µm thick. Pycnidia usually rare; ostiole black. Conidia 5–7 × 0.5 µm. CHEMISTRY: cortex K+ yellow (atranorin); medulla K+ orange, C-, KC+ orange, P+ orange (stictic, ±constictic, cryptostictic and menegazziaic acids and a UV+ yellow substance, UV+ vivid lemon-yellow on charring).
  Endemic in Tas. on bark of trees and shrubs in montane rainforest and in swampy, rather open subalpine areas and coniferous heaths. Usually encircling twigs and small branches; thalli often coalescing along branches.  
  James & Galloway (1992)  

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

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