sympodial
adjective
sym·po·di·al sim-ˈpō-dē-əl 
: having or involving the formation of an apparent main axis from successive secondary axes
sympodial branching of a cyme
Word History
Etymology
New Latin sympodium apparent main axis formed from secondary axes, from Greek syn- + podion base — more at -podium
First Known Use
1875, in the meaning defined above