Nasturtium 

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Family: Tropaeolaceae

Genus: Tropaeolum

Species: Tropaeolum majus

 

Nasturtiums belong to the genus Tropaeolum, comprising about 100 species. The showy flowers of this climbing plant have five petals. The sepals form the funnel-shaped ‘spur’ at the back. The seeds, stems, flowers, and leaves of Nasturtiums are edible. 

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The genus Nasturtium, of the the Brassicaceae family, describes the common Watercress, and not the common Nasturtium.