Cestrum is a genus of - depending on authority - 150-250 species of flowering plants in the family Solanaceae. They are native to warm temperate to tropical regions of the Americas, from the southernmost United States south to the Bío-Bío Region in central Chile. They are colloquially known as cestrums or jessamines (from "jasmine", due to their fragant flowers). They are shrubs growing to 1–4 m tall. Most are evergreen, a few are deciduous.