septifragal
Breaking from the partitions; said of a method of dehiscence in which the valves of a pod break away from the partitions, while these remain attached to the common axis.
the dehiscence is loculicidally septifragal
Where it comes from
From septum + Latin frangere, fractum (“to break”).
Adapted from the Wiktionary entry septifragal (CC BY-SA 4.0).