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New Zealand bittercress (Brassicaceae) is a new species to North America. Presumably introduced in nursery stock, it differs from other bittercresses by producing prostrate stems that root at the nodes. Seedlings form small rosettes; leaves generally have a single egg-shaped leaflet on a long petiole, and occasionally a pair of smaller leaflets below. As plants mature, stems elongate, rooting at the nodes. The inflorescence produces only 4 or 5 seed pods but has indeterminate growth, producing additional inflorescences. Although the plant is generally smaller and less vigorous compared to other bittercresses, the stoloniferous habit could make this species more difficult and costly to remove. [TOP]
