Oenothera Macrocarpa is commonly known as the Missouri Evening Primrose. However, there are a few other synonyms for this species, including Largeflower Evening Primrose, Missouri Primrose, and Ozark Sundrop. This plant is a native North American species, classed as a tall perennial herb. It flowers during the summer months and can grow to be up to two feet in height. Oenothera Macrocarpa is known for its large, yellow flowers which open in the evening to attract moths and butterflies for pollination. With its striking blooms and hardy nature, Oenothera Macrocarpa is a fantastic addition to any wildflower garden.