Monocarpic
Monocarpic , adjective
[Mono- + Greek {not transcribed} fruit: compare French monocarpe.]
(Botany) Bearing fruit but once, and dying after fructification, as beans, maize, mustard, etc.
Annual and biennual herbs are monocarpic, so also some plants of longer duration, as the century plant.
Also: Monocarpous