A yellow dye is obtained from the flowers

Plants for a Future (2017) at www.plantsforafuture.org.uk. http://pfaf.org/user/Plant.aspx?LatinName=Oenothera+biennis

Previously grown as Oenothera glabra, Oenothera odorata

Other common names include: coffee plant, cure-all, fever plant, field primrose, four o'clock, German rampion, large rampion, night willowherb, scabbish, scurvish, wild four o'clock

In traditional herbal medicine the bark and the leaves are astringent and sedative. They have proved of use in the treatment of gastro-intestinal disorders of a functional origin, whooping cough and asthma

http://www.pfaf.org, https://pfaf.org/user/Plant.aspx?LatinName=Oenothera+biennis

Northern America