noun
- a genus of plants in the buckwheat family, including knotweed and smartweed
Usage: botanical
Examples
- The polygonum grew rapidly along the riverbank.
- Japanese polygonum is considered an invasive species in many areas.
- The botanist identified several species of polygonum in the wetland.
- Polygonum plants are known for their jointed stems and small flowers.
- The garden was overrun with polygonum that had spread from a neighbor’s yard.