capitate

adjective

(L. caput, capitis: head) Head-like, or in a head-shaped cluster, as the flowers in many plant groups, but especially those in the dense capitate inflorescences of the Compositae (Asteraceae). Enlarged or swollen at tip, gathered into a mass at apex, as compound stigma; a knoblike stigma terminating a style. Of an inflorescence, with the flowers unstalked and aggregated into a dense cluster; of a stigma, globose, like the head of a pin. Terminated by an enlarged and rounded head.