This rust appears to be restricted to wiry stems and branches of Tangled Lignum. Like many rusts, Tangled Lignum Rust has a complex life cycle with different stages. In spring, tiny (to 2mm) orange to ivory tubular cluster-cups (aecia) are produced. These are arranged in lines and easier to see with a hand lens.
Generously sponsored by the Australasian Plant Pathology Society – Victorian Branch