Sea Oxeye

This species is variable in appearance.[5] In general, it is a perennial herb or shrub reaching up to about 90 centimeters tall. The herbage is gray-green[6] to silvery,[5] and fleshy.[7] It has oval to lance-shaped leaves up to 11 centimeters long. The blades are toothed near the bases, smooth-edged otherwise, and are usually hairy. The leaf base or petiole usually has at least one spine. The inflorescence is a solitary rounded flower head lined with spine-tipped phyllaries. The head has 15 to 30 short, yellow ray florets. At the center are many yellow disc florets with black anthers. The fruit is a dark-colored, flattened, somewhat triangular cypsela a few millimeters long.[3] As the head dries and the flowers fall away, it becomes a hard, spiny, burr-like body packed with the small fruits.[6] The life span of the plant may exceed five years.[5] (Wikipedia)