The nectary of the Tropaeolum, garden nasturtion, is a coloured horn growing from the calyx.

In the Apocynum Androsaemifolium, one kind of Dog's bane, the anthers converge over the nectaries, which consist of five glandular oval corpuscles surrounding the germ; and at the same time admit air to the nectaries at the interstice between each anther.

The importance of the nectary in the economy of vegetation is explained at large in the notes on part the first.