Perennial, 10-70 cm tall, shrubby. Stem base with a number of persistent leaf bases. Stems many from the base. Leaves pinnate to bipinnate; segments linear to ovate. Involucre of a few bracts or lacking. Rays 1-12. Involucel of 5-6 linear bractlets or lacking. Calyx teeth obsolete to minute. Petals white to yellow. Fruit strongly dorsally compressed, furrows 1-vittate; commissure 2-vittate; vittae thin, extending to the base of the fruit. Inner seed face plane.