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Flower of nasturtium cut through the middle to show the spur (s) and the nectar (n).

Cross-section flower

Flower of nasturtium cut through the middle to show the spur (s) and the nectar (n).

A genus of aquatic herbs of the mustard famil, known generally as the water-cresses. The leaves in most species are pinnate, the flowers are yellow or white, and the seeds are borne in a marginless pod in which they are arranged in two irregular rows.

Nasturtium

A genus of aquatic herbs of the mustard famil, known generally as the water-cresses. The leaves in most…

"Coiling of petiole of dwarf tropaeolum." -Bergen, 1896

Tropaeolum

"Coiling of petiole of dwarf tropaeolum." -Bergen, 1896