Actinidia five small petals. Most of the species are dioecious with separate male and female plants, but some are monoecious. The fruit is a large berry containing numerous small seeds; in most species, the fruit is edible. In particular, this genus is known for the species "Actinidia deliciosa", the kiwifruit or Chinese gooseberry, and for the hardy ornamental "A. kolomikta". "Actinidia" macrofossils have been recovered from the late Zanclean stage of Pliocene sites in Pocapaglia, Italy. The 40–60 species of "Actinidia" include: Kiwifruit is a cultivar group of "A. deliciosa", and hardy kiwi is the species "Actinidia arguta", which has small
Kiwifruit servicemen stationed in New Zealand during World War II, and was later exported, first to Great Britain and then to California in the 1960s. In New Zealand during the 1940s and 1950s, the fruit became an agricultural commodity through the development of commercially viable cultivars, agricultural practices, shipping, storage, and marketing. Much of the breeding to refine the green kiwifruit and develop the gold Zespri was done by the Plant & Food Research Institute (formerly HortResearch) during the decades of 1970-1999. In 1990, the New Zealand Kiwifruit Marketing Board opened an office for Europe in Antwerp, Belgium, which became the