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 enteroxantha (Müll. Arg.) R.Sant. | ||
| Ark. Bot. 30A(11): 12 (1942) Parmelia enteroxantha Müll. Arg., Bull. Herb. Boissier 4: 90 (1896). T: Bellinger R., N.S.W., J.H.Maiden; holo: G 003915. |
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| Thallus appressed, forming rosettes to 10 cm wide. Lobes ±radiating, short, inflated, to 4 mm wide, branching subdichotomous, contiguous to margins or rarely discrete, in part imbricate especially towards centre; secondary lobes rare, unorientated, often imbricate. Upper surface often rugose, pale green-grey, not blackened. Cavity vivid chrome yellow above and below, covered with minute yellow crystals, not dissolving in K. Perforations rather few to almost absent, laminal, rounded or elongate, gaping, to 2 mm wide, flat with depressed margin or elevated with a distinct collar. Apothecia few, scattered, 3–6 mm wide, sessile to subpedicellate; disc concave to flat, red-brown, internally chrome-yellow; exciple persistent, often radially lacerate, flexuose below, rumpled-faveolate. Ascospores 2 per ascus, 40–58 × 32–37 µm; wall 4–4.5 µm thick. Pycnidia sparse, often clustered; ostiole blackened. Conidia 5–6 × 0.5 µm. CHEMISTRY: cortex K+ yellow (atranorin); medulla K+ pink-orange, KC-, C-, P+ yellow-orange (thamnolic acid, ±stictic acid, ?calycin, ±UV+ orange pigment). | ||
| Occurs in N.S.W. on canopy twigs of Nothofagus moorei in rainforest, thallus sometimes irregular through fragmentation or encircling small twigs; endemic. | ||
| James & Galloway (1992) | ||
| Checklist Index |
| Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References |
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