Weird tree, El Salvador
Weird tree, El Salvador
Agaves are broadly monocarpic, meaning that they only flower once and die. Some have species do not though, and some individuals do not. Agaves are closely related to and can hybridize with manfredas, which are not monocarpic.
The world of plants is a big beautiful mess.
It is common in that lineage of plants. Fwiw that lineage is named for the asparagus, Asparagaceae, and most of those in that family have similar inflorescences.
Agave is split between between inflorescent traits, arborescent and spicate.
Arborescent is tree like with branching inflorescences. Spicate are simply spikes with little to no branching. Foxtail agave, Agave attenuata, is a good example shown below: