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Mexican Primrose Willow Wikimedia Commons
Onagraceae

Mexican Primrose Willow

Ludwigia octovalvis

Adaptability and waterside tenacity.

Family
Onagraceae
Genus
Ludwigia
Native to
Mexico, tropical Americas
Bloom season
Summer, Fall
Type
herbaceous perennial
Height
60–150 cm
Sunlight
full sun
Soil
moist to wet; tolerates waterlogged soil
Water
high; prefers bog-like conditions
Hardiness
8–11
Lifespan
perennial; vigorous colonizer

Did you know

  • It thrives at the edge of ponds and streams where most other plants cannot tolerate waterlogged roots.
  • The species name 'octovalvis' refers to the eight-valved seed capsule — a distinctive identification feature.
  • It has naturalized across tropical Africa and Asia, where it is sometimes managed as an invasive wetland weed.
  • The four-petaled yellow flowers resemble evening primroses, giving rise to the 'primrose willow' common name.
  • In traditional medicine across the tropics, leaf poultices are used to treat swelling and skin irritations.

Color meanings

Yellow

sunny resilience

Uses

  • rain gardens
  • pond margins
  • wetland restoration
  • erosion control