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Santa Maria Feverfew, Whitetop Weed or Ragweed Parthenium

Parthenium hysterophorus

Description:

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.

Habitat:

Grass by the path in an urban park.

1 Species ID Suggestions

Santa Maria Feverfew
Parthenium hysterophorus


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1 Comment

gatorfellows
gatorfellows 8 years ago

Thanks Chester; I knew you would know :)

gatorfellows
Spotted by
gatorfellows

Texas, USA

Spotted on Oct 18, 2013
Submitted on Oct 29, 2013

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