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Mexican Primrose Willow

Ludwigia octovalvis

Other common name(s):

Mexican Primrose-willow, Narrow-leaf Water Primrose, Seedbox

Family:

Onagraceae (Evening Primrose Family)

Plant Ecoregion Distribution Map

Edwards Plateau, Gulf Coast Prairies and Marshes, Southern Texas Plains, Texas Blackland Prairies, Western Gulf Coastal Plain
Balcones Canyonlands, Edwards Plateau Woodland
Lower Rio Grande Alluvial Floodplain, Lower Rio Grande Valley, Northern Humid Gulf Coastal Prairies, Texas-Louisiana Coastal Marshes
Northern Nueces Alluvial Plains, Rio Grande Floodplain and Terraces, Semiarid Edwards Bajada
Floodplains and Low Terraces1, Northern Blackland Prairie, Southern Blackland Prairie
Flatwoods, Southern Tertiary Uplands

Plant Characteristics

Growth Form

Wetland

Height

3
to
6
ft.

Spread

3
to
6
ft.

Leaf Retention

Deciduous

Lifespan

Perennial

Habitat and Care Requirements

Soil Type(s)

Moist, Mud

Light Requirement

Sun, Part Shade

Water Requirement

Medium

Native Habitat

Wetland or Riparian

Bloom and Attraction

Bloom Color

Yellow

Bloom Season

Summer, Fall

Seasonal Interest

Larval Host, Flowers

Wildlife Benefit

Moths

Maintenance

May need periodic trimming to prevent them from overcoming other plants. Set up a pond or a water collection tank near a downspout to supplement water.

Comments

Blooms June-October. This Water Primrose is a shrubby herbaceous plant that grows well in moist or shallow, submerged soils. Flowers close in the evening to reopen in the morning. The one inch, bright yellow flowers are numerous in the summer months. It is fast growing and reseeds heavily. Larval Host: Water-primrose Hornworm Moth.

References

1) Griffith, Bryce, Omernick & Rodgers (2007). Ecoregions of Texas. 2) https://www.wildflower.org/plants/result.php?id_plant=LUOC. 3) http://bonap.net/TDC/Image/Map?taxonType=Species&taxonId=15705&locationType=County&mapType=Normal. 4) https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=503565#null

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Contact a local Chapter

State Office Phone: 830.997.9272

State Office Address:
Native Plant Society of Texas
PO Box 3017
Fredericksburg, TX 78624

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