Tearthumb

Polygonum arifolium

Photo of Tearthumb
Photo by Dr. John Meade, weed scientist emeritus
Rutgers Cooperative Extension

This member of the smartweed family has downward pointing barbs on the stem which cause injury to the skin if it is pulled. Usually found in very wet spots. The close-up slide shows the barbs on the stem.

Additional Images


  1. Rutgers
  2. Executive Dean of Agriculture and Natural Resources
  3. School of Environmental and Biological Sciences