monochasium
/ˌmɒnə(ʊ)ˈkeɪzɪəm
/noun (plural monochasia) Botany
A cyme in which each flowering branch gives rise to one lateral branch, so that the inflorescence is helicoid or asymmetrical.
Origin
Late 19th century: modern Latin, from mono- 'one' + Greek khasis 'separation'.