Corymb

1. inflorescence in which pedicels branch at different points from the peduncle but flowers form a flat top.

A comparison of inflorescences.
Source: http://hvp.osu.edu/hcs300/glossary/flower.htm#infl



Corymbs of yarrow (Achillea taygetea).
Source: https://www.britannica.com/science/corymb