Actinidia is a genus of ca. 60 eastern Asian species. About five species are widely cultivated as ornamentals or for their edible fruits (kiwifruit) (Ferguson & Nelson 1995) but only one is really common in cultivation (Actinidia deliciosa). A second species with glabrous, berry-like fruits (Actinidia arguta (Siebold & Zucc.) Planch. ex Miq.) is now much propagated in Belgium and might also occur as an escape in the future. It has already been recorded as an established escape in North America (Hale & Connolly 2014).
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Hale I.L. & Connolly B.A. (2014) Actinidia arguta (Actinidiaceae): A new record of a naturalized introduction in Connecticut. Rhodora 116(967): 352-355. [available online at: http://www.rhodorajournal.org/doi/pdf/10.3119/14-01]
Huang Hongwen (2015) The genus Actinidia: A world monograph. Science Press: 317 p.
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Li X.W. & Li J.Q. (2010) A review of the infrageneric taxonomy and nomenclature of Actinidia (Actinidiaceae). Ann. Bot. Fennici 47: 106-108.