Calyceraceae
Calyceraceae is a plant family in the order Asterales. The natural distribution of the about sixty species belonging to this family is restricted to the southern half of South America. The species of the family resemble both the family Asteraceae and the Dipsacaceae. Description Calyceraceae are perennial or annual herbs. There may be a few or many branched stems that may be without hair or with soft silky hairs. The leaves may be in a rosette at the base of the stems or set alternately along the stems. Stipules are lacking. The leafblade is simple, but may be lobed to pinnatisect. The margin of the leaves may be entire or toothed. The inflorescences are flowerheads comparable to those in the sunflower family. They are at the top of the stems or opposite leaves, and may have a flowerstem or be seated, while each flowerhead may be on its own or in a cyme. Each individual flowerhead is surrounded by an involucre, consisting of one or two rows of bracts that are often leaf-like and usually not merged. The base of the flowerhead may be conical, convex or sometimes almost spheroidal. On the base of the flowerhead, at the base of