Verbena, from the family Verbenaceae, is considered the prettiest violet flower in the world. Believe it or not, purple is one of the most common flower colors, usually due to the presence of the chemical anthocyanin. Verbena is also known as purple-top vervain. It is characterized by having a small purple five-petaled flowering plant. A cluster of small star-shaped flowers appears at the top of the plant the bushy plants are complemented by lanced-shaped deep green-colored leaves.