Publication: Soc. Agr. Dept. Seine 11: 79. 1808.
Origin: Introduced from southern Europe
selected vouchers: WTU
Notes: Recently collected in King County, where fully naturalized on a montane rocky bald north of Interstate 90 east of North Bend. The bald is adjacent to rock climbing routes, suggesting propagules may have arrived with climbers. The plants form reproducing populations across a several hectare area of balds and rock faces.