Biology Seedling leaves have deeply lobed margins with pointed tips, and are arranged in rosettes. Juvenile Numerous basal leaves arranged in a rosette, with the lowest being pinnately lobed.
Upper leaves are entire and sharply pointed.
Mature Plants reach 30 to 50 cm tall, are highly branched from the base, and have winged stems. Flower Flowers are solitary at the ends of branches. Flowers are bright yellow and have long yellow spines on the bracts. Flower heads are composed of both disk and ray flowers.