Cestrum sp. (Butterfly Flower)

Cestrum is a genus of evergreen or deciduous shrubs and small trees in the Solanaceae family, comprising more than 150 species native mainly to tropical and subtropical regions of the Americas. Depending on the species, plants may grow from compact shrubs to vigorous, spreading plants 10-15 feet (3-4.5 m) tall or more. The foliage is usually simple and alternate, while clusters of slender, tubular flowers appear at the ends of branches or in the leaf axils. Flower color varies among species and cultivars from white, cream, and yellow to greenish, pink, red, or purple.

Many Cestrums are noted for their powerful fragrance, particularly at night, although some species have little or no scent. Flowers may be produced repeatedly through much of the warm season and are attractive to butterflies, moths, hummingbirds, and other pollinators. Cestrums generally grow best in full sun to partial shade and fertile, well-drained soil with regular moisture, and established plants tolerate moderate pruning well. Most species are best suited to USDA Zones 9-11, while some of the hardier species can survive in Zone 8, often with winter dieback or protection. All parts of many species, especially the fruits and foliage, contain toxic compounds and should not be eaten. Their long flowering season, often intense fragrance, and adaptability make Cestrums popular flowering shrubs for warm-climate gardens.