False Ragweed, Santa Maria, Feverfew
Parthenium hysterophorus L.
Family :Asteraceae
Longevity :Annual
Origin :Native
Season :Warm
Ragweed Parthenium 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 Parthenium is found growing in all soils types of the South Texas Plains and the Edwards Plateau regions. It blooms from August to December.
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