Ludwigia grandiflora
Non-Native
USDA, NRCS. 2018. The PLANTS Database (http://plants.usda.gov, 28 March 2018). National Plant Data Team, Greensboro, NC 27401-4901 USA.
Illustration courtesy of University of Florida/IFAS Center for Aquatic and Invasive Plants. Used with permission.
What is Large-flower Primrose?
Physical Characteristics
Leaves:
- Sword-shaped
- 1.18-3.94 inches long
- 1.10-3.94 inches wide
- Leaf stalk 0.04-0.2 inches long
Flowers:
- Petals 0.47-0.59 inches long
- 2x as many stamen than sepals
Fruit:
- Dry seed pod
- 0.51-0.98 inches long
- 0.12-0.16 inches thick
Seeds:
- 0.4-0.5 inches long
- 0.4-0.47 inches thick
- Woody
Stem:
- Long
- Hairy
- Up to 3 feet tall
Where Does it Grow?
Large-flower primrose can be found in shallow marshes, ponds and ditches.
Is it Invasive?
Large-flower primrose is non-native to North America. It is an aggressive invader that out-competes the native vegetation for vital resources.
This plant is not native to North America and should not be introduced into new water bodies and should be treated with herbicide when present.