See p. 136. Annuals to perennials. Stem generally scapose, ribbed and hollow.
Leaves exstipulate, generally much dissected, with sheathing petioles.
Inflorescence an umbel or compound umbel. Flowers small, ovary generally 2-parted and inferior. Fruit a schizocarp. Ours annuals to perennials. Inflorescence a head, either discoid, ligulate or radiate, subtended by phyllaries.