monochasium

noun, plural mon·o·cha·si·a [mon-uh–key-zhee-uh, -zhuh, -zee-uh] /ˌmɒn əˈkeɪ ʒi ə, -ʒə, -zi ə/. Botany.

1. a form of cymose inflorescence in which the main axis produces only a single branch.

noun plural -sia (-zɪə)

1. botany a cymose inflorescence in which each branch gives rise to one other branch only, as in the forget-me-not and buttercupCompare dichasium