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Genus Nicotiana
- American and Asiatic aromatic herbs and shrubs with viscid foliage
Genus Nierembergia
- genus of tropical American erect or creeping herbs with solitary flowers
Genus Petunia
- annual or perennial herbs or shrubs of tropical South America
Genus Salpichroa
- herbs of temperate North and South America: cock's eggs
Genus Salpiglossis
- small genus of herbs of the southern Andes having large showy flowers
Genus Schizanthus
- Chilean herbs with orchid-like flowers
Genus Scopolia
- genus of European perennial herbs yielding medicinal alkaloids
Genus Solandra
- shrubby climbers of tropical America