Umbelate is a term that is used to describe a plant structure that is arranged in the shape of an umbrella, with many small flowers or fruit growing out from a central point. There are several synonyms that can be used to describe an umbelate structure including inflorescence, head, cluster, spike, raceme, and panicle. Inflorescence is a general term that refers to the arrangement of flowers on a plant, while head and cluster are used to describe a group of flowers or fruit growing closely together. Spike, raceme, and panicle are more specific terms that describe the arrangement of flowers on a stem or axis in an elongated or branched structure.