The rust is widespread throughout New Zealand. The host species Muehlenbeckia australis and M. complexa are endemic and widely distributed, whereas M. axillaris is indigenous and occurs also in Australia and Tasmania.

Type: Rust and Smut Fungi; Description: Spermagonia in scattered more or less circular groups, minute, immersed, yellow; on upper leaf surfaces. Uredinia minute, circular or elliptical, cinnamon brown, up to 1 mm in diameter; on lower surfaces of leaves. Urediniospores obovate to elliptical, 26–32 × 20–24 μm, coarsely and sparsely echinulate, cinnamon brown. Telia, which appear at the beginning of the winter, are similar to and at first intermixed with uredinia, dark brown. Teliospores broadly elliptical, 1-septate, 28–36 × 20–26 μm, coarsely warted, chestnut brown; pedicel deciduous.

Distribution: Northland, Auckland, Waikato, Taranaki, Taupo, Wanganui, Wellington, Wairarapa, Gisborne, Nelson, Buller, Fiordland, Kaikoura, Mid Canterbury, Mackenzie, Otago Lakes, Central Otago, Dunedin, Southland, Stewart Island, Chatham Islands.; 1st Record: Cunningham (1923a).

Significance: None.; Host(s): Muehlenbeckia australis, M. axillaris, M. complexa.