A herb. It is erect and 1.5 m tall. The taproot is slightly woody. The leaves are alternate and the upper leaves can be in rings. They do not have leaf stalks. There can be a cluster of small leaves in the axils. The leaf blade is narrow and 2-9 cm long by 0.5-2.5 cm wide. The edges can be wavy and there can be teeth. The flowering stalk is like a spike and 40 cm long. The flowers have both sexes. The fruit is made up of one seeded sections spreading out like a star. The seeds are kidney shaped and 1.5 mm long by 1 mm wide. They are dark brown and wrinkled.