| Watercress | 
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| Leaves | 
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| Flowers | 
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| Scientific classification | 
| Kingdom: | Plantae | 
 
| Clade: | Tracheophytes | 
 
| Clade: | Angiosperms | 
 
| Clade: | Eudicots | 
 
| Clade: | Rosids | 
 
| Order: | Brassicales | 
 
| Family: | Brassicaceae | 
 
| Genus: | Nasturtium | 
| Species: | N. officinale | 
| Binomial name | 
| Nasturtium officinale 
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| Synonyms | 
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Arabis nasturtium Clairv.
Baeumerta nasturtium P.Gaertn., B.Mey. & Schreb.
Baeumerta nasturtium-aquaticum (L.) Hayek
Cardamine aquatica (Garsault) Nieuwl.
Cardamine fontana Lam.
Cardamine nasturtium (Moench) Kuntze 
Cardamine nasturtium-aquaticum (L.) Borbás 
Cardaminum nasturtium Moench 
Crucifera fontana E.H.L.Krause
Nasturtium fontanum Asch.
Nasturtium nasturtium-aquaticum (L.) H. Karst.
Nasturtium siifolium Rchb. 
Radicula nasturtium (Moench) Druce
Radicula nasturtium-aquaticum (L.) Britten & Rendle 
Rorippa nasturtium (Moench) Beck 
Rorippa nasturtium-aquaticum (L.) Hayek 
Rorippa officinalis (W.T. Aiton) P. Royen 
Sisymbrium amarum Salisb.
Sisymbrium cardaminefolium Gilib.
Sisymbrium fluviatile Vell.
Sisymbrium nasturtium (Moench) Willd.
Sisymbrium nasturtium-aquaticum L.
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Watercress or yellowcress (Nasturtium officinale) is a species of aquatic flowering plant in the cabbage family, Brassicaceae.
Watercress is a rapidly growing perennial plant native to Eurasia. It is one of the oldest known leaf vegetables consumed by humans. Watercress and many of its relatives, such as garden cress, mustard, radish, and wasabi, are noteworthy for their piquant flavors.