False Ragweed

Parthenium hysterophorus

 

Warm season annual.

 

Ragweed is a coarse, upright, annual plant growing 12-40 inches high. Each flower head which only reaches 3/16 inch in diameter consists of 5 white ray flowers and numerous disk flowers. The leaves are 4-8 inches long and are deeply lobed. The flowers of this plant produce an abundance of pollen, making it a major hay-fever plant. Ragweed is found growing in all soils types.. It blooms from August to December.