Forestiera Genus

Forestiera is a genus of about 20 species of flowering shrubs and small trees in the olive family, Oleaceae, placed in the order Lamiales. Members of the genus are commonly known as swampprivets, a name reflecting the preference of many species for moist, low-lying habitats in warm-temperate and subtropical regions. Most species take the form of deciduous or semi-evergreen shrubs, though a few grow into small trees; they typically bear simple, opposite leaves and small, inconspicuous flowers that appear before or alongside the leaves in early spring, followed by small olive-like drupes.

The genus comprises roughly 20 recognized species distributed across the southern United States, Mexico, Central America, the West Indies, and Ecuador. In the United States, species range from Florida and the Gulf Coastal Plain westward through Texas to the desert Southwest, and the genus reaches its greatest diversity in Mexico and Central America. Phylogenetic analysis places Forestiera as sister to Hesperelaea, an extinct North American lineage within Oleaceae, underscoring the genus's deep roots in New World biogeography.

Notable members include Forestiera pubescens (downy forestiera or stretchberry) of the southwestern United States and northern Mexico, Forestiera segregata (Florida swampprivet) of Florida and the wider Caribbean, Forestiera angustifolia (Texas swampprivet) of Texas and northeastern Mexico, and Forestiera shrevei (desert olive) of Arizona. Several species are grown as ornamental shrubs or used in native-plant landscaping for their wildlife value — the small dark drupes are an important food source for birds.