Department of the Environment and Water Resources home page

About us | Contact us | Publications | What's new

Header imagesHeader imagesHeader images

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 platytrema (Müll.Arg.) R.Sant.
  Ark. Bot. 30A(11): 13 (1942)
Parmelia platytrema Müll.Arg., Flora 70: 60 (1887). T: Mt Ellery, Gippsland, Vic., Walther; holo: G.
  Thallus closely appressed, 3–15 cm wide. Lobes inflated, 1–4 mm wide, contiguous to margins, irregularly dichotomously branched, at centre congested-imbricate, somewhat contorted, compacted, convex; secondary lobes unorientated and sometimes obscuring thallus centre. Upper surface smooth, somewhat shining, sometimes becoming rugose towards centre, pale grey or grey, not or little blackened laterally, not or little browned at tips. Cavity pale to purplish black above, uniformly black below. Perforations evenly distributed, gaping, rounded or oval, 1–1.5 mm wide, laminal, flat or somewhat depressed with down-turned margins. Apothecia often crowded, 3–6 mm wide, laminal, shortly pedicellate or sessile; disc concave to flat, scabrid, pale to dark red-brown; exciple smooth, becoming coarsely crenulate. Ascospores 2 per ascus, 45–57 × 25–32 µm; wall 2.5–3.5 µm thick. Pycnidia numerous, immersed, blackish around ostiole, sometimes coalescing and blackening upper surface of lobes. Conidia 6–7 × 0.5 µm. CHEMISTRY: cortex K+ yellow (atranorin); medulla K+ orange-red, C-, P+ orange (stictic, cryptostictic, menegazziaic and norstictic (trace) acids and accessory compounds.
  Occurs in W.A., N.S.W., A.C.T., Vic. and Tas. Grows on bark on twigs in rainforest, and on bark in wet and dry sclerophyll forest and forest margins, on low shrubs in alpine areas, and on rocks under trees, occasionally spreading onto mosses or soil and then thallus becoming more loosely attached.  
  James & Galloway (1992)  

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

This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from Australian Biological Resources Study. Requests and inquiries concerning reproduction and rights should be addressed in the first instance to Dr P. McCarthy. These pages may not be displayed on, or downloaded to, any other server without the express permission of ABRS.

Top | About us | Advanced search | Contact us | Information services | Publications | Site index | What's new