The Willowherb family of 650 species in 17 genera includes Fuchsia, native to South and Central America and New Zealand, Oenothera (Evening Primrose), native to the Americas, Epilobium/Chamaenerion (Willowherb) with a worldwide distribution and Clarkia and Gaura, native to North America.
Typically in this family flowers have 4 Sepals – sometimes in a prominent calyx tube (as shown in the Fuchsia) – 4 Petals, 8 Stamens, and 1 Style with 1 stigma which has 4 lobes (as shown clearly in the Great Willowherb)
Fuchsia ‘Dark Eyes’
Fragrant Evening Primrose Oenothera stricta. The flowers open for 1 night but more if not pollinated. Two species were introduced to Britain in the 19th century but now are wild flowers, O. stricta on sand dunes and O. biennis (Common Evening Primrose) on waste ground, railway cuttings and roadsides.
The flowers of White Gaura Gaura lindheimeri has 4 white petals, 8 white stamens and a long style. This species and its varieties are popular garden perennials. It is native to southern North America and Mexico
Godetia Clarkia amoena is native to western North America. It is a popular hardy annual garden plant.