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  1. Life
  2. Plants
  3. Vascular Plants
  4. Dicots
  5. Sunflowers, Bellflowers, Fanflowers, and Allies
  6. Sunflower Family
  7. Thoroughwort
  8. Siam Weed

species 23,575 observations

Siam Weed

Chromolaena odorata

Status
native
Traits
Where
In the US
Source
iNaturalist

Field notes

Supports All

118 native animals
supported in the US
  • Caterpillars Moths and butterflies raised on it Rounded Metalmark, Dichomeris delotella, Yellow-winged Pareuchaetes Moth 3
  • Hosted animals Gall makers, leaf miners and other animals living on or in it Chromolaena Leaf-mining Fly 1
  • Plant eaters Animals that feed on it Northern Cardinal 1
  • Flower visitors Pollinators and other flower visitors Monarch, Fiery Skipper, Queen, Julia Heliconian 113

Range

United States

Greener is more native, amber more introduced; paler is less certain. How this was decided

Key traits

Layer
Shrubs
Light
Part shade
Moisture
Dry
Water use
Low
Plant type
Perennial Shrub

From USDA PLANTS and the Lady Bird Johnson Wildflower Center.

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