|Other names:||flatspine burr ragweed, bursage, bursage ragweed, flat-spine burr-ragweed, sand bursage|
Grey-green leaves have deep lobes and are covered with short, bristly hairs. Seed is a burr with flattened spines. Upright growth habit to about 30 inches tall. A drought tolerant weed of sandy, disturbed ground.