monocarpic
/mɒnəˈkɑrpɪk/Definitions
1. adjective
Describing a plant that flowers only once in its lifetime and then dies.
“The monocarpic orchid blooms beautifully but only once before fading.”
2. noun
A plant that has only one flowering period in its lifetime.
“The monocarpic species in the forest bloom in the spring.”