Giant Ragweed
| Plant Profile | |
|---|---|
| FYUSE 3D Image |
Common Name: Giant Ragweed Species Name: Ambrosia trifida Plant Type: Forb Family Name: Asteraceae, Sunflower Family |
Examples of Giant RagweedAmbrosia trifida
| Plant Facts | |
|---|---|
| Origin | Native |
| Duration | Annual |
| Distribution in the U.S. | Central half of the country from Canada to Mexico |
| Distribution in Oklahoma | Throughout the state |
ID Characteristics
- Field Identification Characteristics
Vegetative
- Can be a very tall, large plant (6+ feet)
- Large palmate, lobed leaves on long stems
- Foliage dark green
- When plant is cut and squeezed, it will ooze a watery red sap
Floral
- Flowers green in vertical clusters; seed heads brown in fall and winter
- Leaf and Stem Characteristics
- Leaf Type: Simple
- Leaf Arrangement: Opposite
- Leaf Shape: 3-5 lobed
- Stipules: Absent
- Floral Characteristics
- Petal Number: 8-10 (male); 1-2 (female)
- Flower Color: Green (inconspicuous)
- Flower Timing: July-October
- Fruit Type: Achene
| Habitat/Ecology | |
|---|---|
| Soil Type | Various; best growth in moist, deep soil |
| Habitat | Moist, disturbed sites with deep soil |
| Successional Stage | Early |
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