False Ragweed, Parthenium hyterophorus,full size plant in bloom.
by frostweed Jul 20, 2005 10:54 PM
False Ragweed, Parthenium hyterophorus, small plant in my yard.
by frostweed Jul 20, 2005 10:54 PM
False Ragweed, Parthenium hyterophorus, beginning to bloom.
by frostweed Jul 20, 2005 11:11 PM
by Dinu Jul 25, 2002 2:38 AM
Blooming in January in Houston, TX-my garden
by steadycam3 Feb 3, 2013 11:07 AM
The 3/16 inch across flowerheads have 5 ray flowers and numerous disk flowers.
by htop Sep 18, 2004 4:50 PM
The flowerhead resembles a teensy cauliflower. The blooms produce a large amount of pollen.
by htop Sep 19, 2004 4:50 PM
