Find out why this hormone-balancing oil needs to be a part of your natural beauty care routine with these 10 beauty benefits of evening primrose oil. What is Evening Primrose Oil The evening primrose (scientific name: Oenothera biennis) is a small flowering plant that produces delicate yellow flowers, blooming from late spring to early summer. Evening primrose oil (where to get it) is a therapeutic oil extracted from the seeds of the plant. The oil has a translucent golden yellow color and a slightly nutty scent. It is also most popularly known for its labor-inducing effects and is often used by Continue Reading