Large-Flower Primrose Willow
Ludwigia grandiflora ssp. grandiflora
Plant Description
An emergent perennial aquatic plant with smooth alternate leaves attached to pubescent stems; yellow flowers with 5-6 petals. During early growth stages, leaves are usually rounded ; once it begins to flower, the leaves lengthen – becoming lanceolate to elliptic.
Plant Details
| Life Forms | |
|---|---|
| Habitats | |
| Soil and Moisture Conditions | |
| Suggested Actions | |
| Shade Preference | |
| Mature Height | flowering stems can rise up to 3 feet above the water |
| Distribution | In Rivers and other water bodies up and down the west coast and in the southeastern US. |
| Control | Prevention is the best strategy , followed by early detection and rapid response. Report infestations to OregonInvasivesHotline.org. |
| Reproduction and Spread | Often spread as an ornamental for Aquatic Gardens. Spreads by seeds and stem fragments with movement of water, waterfowl, and recreational equipment. |
| Introduced | First observed in California and Oregon in the 1940s, but spreading rapidly in the last 20-30 years. |
| Look Alikes | other Ludwigia species |
| Impact | Clogs Waterways, degrades wildlife habitat, negatively impacts water quality and Aquatic recreation. |
| More Info |
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