Is a genus of flowering plants in the aster family, Asteraceae. are cultivated as ornamental plants.
They are perennial plants growing from red-tipped rhizomes. The plant produces one erect stem usually reaching 40 to 130 centimeters tall, but known to exceed 2 meters at times. It is branching or unbranched and hairy to hairless. Some species have mainly basal leaves, and some have leaves along the stem, as well. Some leaves are borne on petioles, and others are sessile, attached to the stem at their bases.
The flower head is solitary, paired, or in a group of three on the stem.