Calyceraceae

Calyceraceae, family of small and economically unimportant dicotyledonous flowering plants containing six genera (Boöpis, Calycera, Acicarpha, Acarpha, Gamocarpha, and Moschopsis) with 60 species distributed in Central and South America. One species (Acicarpha tribuloides) occurs as a roadside weed in Florida. Plants of this group are small herbs, occasionally somewhat woody near the base, with alternating leaves and with flowers in dense heads surrounded by a series of small, green, leaflike bracts (an involucre). The flowers...