Pat McCarthy (Canberra)
Enterographa reticulata (Roccellaceae)
on basalt in lowland, subtropical forest, Max Nicholls Track, Lord Howe Island, Australia [SW Pacific Ocean]
Coll: J.Elix, 1995
Thallus to 0.5 mm thick. containing calcium oxalate, lacking lichen substances (by HPLC). Lirellae outwardly brown-black, immersed in the thallus, not in pseudostromata, to 0.12(-0.15) mm wide, initially punctiform, later coalescing in lines up to 4(-5) mm long, the lines branching and connecting to form reticulate patterns; excipulum medium to dark brown in thin section, producing norstictic acid (crystals). Spores 8 per ascus, 3(-5)-septate, 32-45 × 2.5-3.5 µm.
An excellent key to the species of Enterographa in
Seavey F; Seavey J (2014): New additions to the lichen genus Enterographa (Roccellaceae) from Everglades National Park including an updated world key. Lichenologist 46, 83–93.
Enterographa reticulata (Roccellaceae)
on basalt in lowland, subtropical forest, Max Nicholls Track, Lord Howe Island, Australia [SW Pacific Ocean]
Coll: J.Elix, 1995
Thallus to 0.5 mm thick. containing calcium oxalate, lacking lichen substances (by HPLC). Lirellae outwardly brown-black, immersed in the thallus, not in pseudostromata, to 0.12(-0.15) mm wide, initially punctiform, later coalescing in lines up to 4(-5) mm long, the lines branching and connecting to form reticulate patterns; excipulum medium to dark brown in thin section, producing norstictic acid (crystals). Spores 8 per ascus, 3(-5)-septate, 32-45 × 2.5-3.5 µm.
An excellent key to the species of Enterographa in
Seavey F; Seavey J (2014): New additions to the lichen genus Enterographa (Roccellaceae) from Everglades National Park including an updated world key. Lichenologist 46, 83–93.