Cleomella is a small genus of about ten species of flowering plants. Like their relatives, the cleomes, plants of this genus have traditionally been included in the caper family Capparaceae but have recently been moved into a new family, Cleomaceae. Cleomella are annual wildflowers native to the dry and desert regions of western North America. They are similar to cleomes in appearance. They are erect and branching with leaves divided into three leaflets and inflorescences of yellow flowers with long stamens. Cleomella species are known commonly as stinkweeds or simply cleomellas.