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Large-flower Primrose

Ludwigia grandiflora

Non-Native


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?


USDA, NRCS. The PLANTS Database (http://plants.usda.gov). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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.

How to Manage This Plant
Plant Glossary

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Aquatic plant photographs were provided by David Bayne, Jim Davis, Kelly Duffie, Billy Higginbotham, Michael Masser, John Clayton, Chetta Owens, Diane Smith, Joe Snow, Don Steinbach, Bridget Robinson Lassiter and Peter Woods.

You may use these photos, so long as you give credit to AquaPlant.

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