paniculate

Etymology
From panicle, a compound inflorescence in which the flowers are arranged along a single central axis.

Adjective

 * 1) Having a branched cluster of flowers.

Usage notes
Strictly, the adjective should be used only when the inflorescence branches into racemes, but usage is extended by botanists to include similar branching structures such as corymbs and thyrses. The comparative and superlative forms can be used only informally.