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. |
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| 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 |
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