Red Tulips Royalty-Free Stock Photo

Many tulip flowers are cup-shaped, but some cultivars have a star or bowl form. All tulip flowers have six petals, and the petals can be smooth, fringed or ruffled. The blossoms may be single or double, and the flowers come in nearly every color except true blue. Some tulip blossoms are single-colored, while others are striped, swirled, flamed from the bottom or margined. The plants range in size from 4 to 24 inches in height, with an upright form. Their leaves are usually medium green in color, with a lance or oval shape. Tulip blossoms open during the day but close in the evening. These plants are phototropic, meaning they bend toward the light.