Noun
(New Zealand) An upright shrub in the sunflower family, Chrysanthemoides monilifera, which is native to South Africa but is an invasive pest in Australia and New Zealand.
(Australia) The subspecies Chrysanthemoides monilifera subsp. monilifera (the subspecies Chrysanthemoides monilifera subsp. rotundata being known there as bitou bush)
Source: en.wiktionary.org