a rust fungus, see images and description on http://www.nzffa.org.nz/farm-forestry-model/the-essentials/forest-health-pests-and-diseases/diseases/Uromycladium/UromycladiumPath15
Locality: NEW ZEALAND AK, Auckland Central, 48-52 Mayoral Drive (Mayoral Drive margin of Aotea Centre grounds). Habitat: Acacia longifolia. Cultivated tree. Identification: Uromycladium maritimum McAlpine, 1905. The last image shows a pine pollen grain contaminant.