This short lived perennial is native to Europe and western Asia. It was brought to this country by early settlers, and has naturalized ...Read Moreover a large area.
It is said to have many medicinal qualities in folk medicine.
It is monotypic—the only species in its genus.
It was named after Swallows because it is said that it starts blooming when the swallows return in spring and stops blooming when they leave in the autumn.
This short lived perennial is native to Europe and western Asia. It was brought to this country by early settlers, and has naturalized ...Read More