Any of the poisonous plants belonging to the genus Solanum, especially black nightshade or woody nightshade.

plural of nightshade

The plant Atropa belladonna, a perennial shrub of the nightshade family that contains high concentrations of the alkaloid atropine which can be deadly if taken in excess.

A shrubby plant, Solanum dulcamara.

plural of deadly nightshade

Leafy green plants of genus Basella. / Solanum dulcamara, a vine with poisonous foliage.

Basella alba; an Asian leaf vegetable.

plural of climbing nightshade

A Eurasian species of nightshade with black berries, Solanum nigrum, of Europe. / Solanum americanum (American black nightshade) of much of North America

Any of the genus Circaea of low inconspicuous perennial plants, found in damp, shady places.