https://doi.org/10.4081/nhs.2026.1002
Patrinia villosa (Thunb.) Dufr. (Valerianaceae) new to the European alien flora: report and taxonomic treatment
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Published: 2 July 2026
Patrinia villosa (Valerianaceae) is reported for the first time as a casual alien species in Italy (Lombardy), marking its first known occurrence in Europe. Patrinia villosa and P. scabiosifolia, both native to Asia, have recently been introduced into the Italian horticultural market as flowering plants for gardens and containers. Furthermore, P. scabiosifolia has escaped in Germany, Austria, and Belgium. The hybrid of the two species (Patrinia ×hybrida) is known, and even for this nothospecies possible escapes into the wild cannot be ruled out, as with parent species. The present report also provides an opportunity to propose a taxonomic reinterpretation of the P. villosa diversity, with the elevation and separation of P. villosa subsp. punctifolia at species rank.
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