watercress cresses that grow in clear ponds and streams
arabidopsis thaliana,
mouse-ear cress a small invasive self-pollinating weed with small white flowers; much studied by plant geneticists; the first higher plant whose complete genome sequence was described
arabidopsis lyrata a small noninvasive cross-pollinating plant with white flowers; closely related to Arabidopsis thaliana
bitter cress,
bittercress any of various herbs of the genus Cardamine, having usually pinnate leaves and racemes of white, pink or purple flowers; cosmopolitan except Antarctic