Sumpweed
Common Name: Sumpweed
Other Names: Annual Marsh-elder, Rough Marsh-elder
Species Name: Iva annua
Plant Type: Forb
Family Name: Asteraceae, Sunflower Family
Examples of Sumpweed Iva annua
| Plant Facts | |
|---|---|
| Origin | Native |
| Duration | Annual, perennial or biennial |
| Distribution in the U.S. | Eastern US to Nebraska, Kansas and New Mexico |
| Distribution in Oklahoma | Body of the state |
ID Characteristics
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Field Identification Characteristics
Vegetative
- Rough texture on stems and leaves
- Stems branching from thick shaggy root
- Opposite, alternate leaves; broad to narrow teardrop shape; serrated
Floral
- Columns of green unnoticeable flowers rise from where leaves attach to stem
-
Leaf and Stem Characteristics
- Leaf Type: Simple
- Leaf Arrangement: Opposite; uppermost alternate
- Leaf Shape: Ovate
- Stipules: Absent
-
Floral Characteristics
- Flower Color: Green (Inconspicuous)
- Flower Timing: August-October
- Fruit Type: Achene
| Habitat/Ecology | |
|---|---|
| Soil Type | Various |
| Habitat | Moist, bare spots; borrow ditches, mudflats and exposed shorelines |
| Successional Stage | Early, but occurs in all stages |