Reproduction traits of Bunias orientalis plants. Twelve populations of native (green), invasive (red) or naturalised (yellow) status were grown in a field common garden under two nitrate-fertilisation treatments, low (light shade) and high (dark shade) (n = 4–6 per population and fertilisation treatment; for population codes see Table 1). a Flowering start date, b height of the longest stem with inflorescences and c number of developed silicles. Box plots: median, 5th, 25th, 75th, 95th percentiles; open dots: outliers. Lines along four populations of similar status: status mean values for low (dashed) and high (solid) fertilisation treatments.