Polygonum tenerum, common name tall jointweed, slender jointweed, or wireweed, is a species of flowering plant.

[2] It grows in the southeastern United States including parts of Florida, Georgia, Mississippi, North Carolina, South Carolina, and southern Alabama.

[3] It grows in sandhill and dry pineland habitats.

[4] It has small wiry stems and can grow to five feet tall.

It produces reddish-brown achenes[3] Polygonella gracilis is a synonym.