There are many species of pigweed and they are weed pests in several cropping systems. Amaranthus spinosus, spiny amaranth, has sharp, strong spines on the stem. A. graecizans breaks off at the ground line and being round shaped is blown around by the wind.
Photo by Dr. John Meade, weed scientist emeritus
Rutgers NJAES Cooperative Extension
Photo by Dr. John Meade, weed scientist emeritus
Rutgers NJAES Cooperative Extension