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Parthenium hysterophorus
Santa Maria feverfew Aster Family
Parthenium hysterophorus Asteraceae
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English common names
  •Santa Maria feverfew
  •ragweed parthenium
  •whitetop weed
Spanish common names
  •escoba amarga
  •falsa altamisa
  •altamisa del campo
accepted scientific name
  •Parthenium hysterophorus L.
rules for finding collection records
  •Parthenium hysterophorus (114)
  •excludeParthenium hysterophorus lyratum
family name
  •Asteraceae
Image Author: ©2013 Forest And Kim Starr
Image License: CC BY
Image Source Image Source
Category: Wildflowers
Flowers: No obvious petals
Petal colors: color
Leaf: Alternate, Compound
Plant Observed beginning of October thru second week of May

How Likely at this Location (46%)
Name Match (100%)
Plant Showiness (36%)
base map where plant found

Disturbed
Forest
Riparian
grid lines base