A campion, Silene nutans, with drooping white flowers which open in the evening, native to Eurasia and North Africa and first recorded in Britain growing around Nottingham Castle.
Origin
Mid 18th century.
Definition of Nottingham catchfly in US English:
Nottingham catchfly
noun
A campion, Silene nutans, with drooping white flowers which open in the evening, native to Eurasia and North Africa and first recorded in Britain growing around Nottingham Castle.