Distribution of mustards in Australia and New Zealand. A. pe = Alliaria petiolata, B. al = Brassica alba, B. ju = B. juncea, B. na = B. napus, B. ni = B. nigra, B. ra = B. rapa, C. ir = Calepina irregularis, E. re = Erysimum repandum, N. pa = Neslia paniculata, S. of = Sisymbrium officinale, S. or = S. orientale and S. er = S. erysimoides. Box represents in which state or region the species are distributed. The figure is adapted from [16,17,18,19], Atlas of Living Australia, Australia’s Virtual Herbarium, Flora of Australia Online, Flora of New Zealand, Plants for the Future Database, National Library of New Zealand, New Zealand Plant Conservation Network, Auckland Museum (http://www.aucklandmuseum.com/collection/object/) and http://www.herbiguide.com.au.