An inflorescence is a group or cluster of flowers on a branch of a plant. In botany the term refers to the way individual flowers are arranged on the plant, in which single or multiple flowers develop on the same stem. There are two fundamental terms used to describe the nature of inflorescences:
Determinate - the first flowers of the inflorescence to open are at the top end of inflorescence or terminal. The top flower blooms first.
Indeterminate - the first flowers to bloom are the ones at or near the bottom of the inflorescenes, that is the first flowers start blooming at the bottom of the stem or inside a cluster of flowers.