The rust fungus Uromyces geranii was previously collected from Bulls Head in the ACT by John Walker in 2004 (Walker J. The Rusts of Geraniaceae in Australia, Polish Botanical Journal 55(2): 315–334, 2010). Like the previous collection this was also recorded on Geranium solanderi. The photomicrographs show the finely and sparsely echinulate pedicellate urediniospores mentioned in the Walker paper.