Claytonia perfoliata Willd.

Raab-Straube, Eckhard von & Raus, Thomas, 2022, Euro + Med-Checklist Notulae, 15, Willdenowia 52 (2), pp. 273-299 : 286

Claytonia perfoliata Willd.

A Uk: Ukraine: Cherkasy Oblast, Uman City, 48.75574°N, 30.23643°E, the new territory of the National Dendrological Park Sofiyivka, a few weedy plants in a flower bed, 8 Jun 2021, Chorna & Kostruba (UPU; photo: https://www.inaturalist.org/observations/131253813). – Claytonia perfoliata is an annual plant native to the Pacific part of North America, extending to Guatemala in Central America ( Miller 2004; POWO 2022d). Its secondary range as an introduced horticultural weed covers countries and areas with a temperate humid climate in southernmost South America, W and C Europe, Japan, SE Australia and New Zealand (Walters & Akeroyd 1993; Raab-Straube 2018a +; GBIF 2022b). As an escape from botanic gardens it is judged as naturalized and potentially invasive in France, Germany and the Netherlands ( European Botanic Gardens Consortium 2018). In 2021, we discovered C. perfoliata as a weed in a newly planted flower bed in the National Dendrological Park Sofiyivka. The species was probably unintentionally introduced with material of ornamental plants. This is the first find of it in Ukraine. In 2022 we continued to monitor this habitat, but no new plants were recorded. Therefore, we consider the status of C. perfoliata in Ukraine as a casual alien.

G. Chorna, O. Shynder & T. Kostruba