Ludwigia alternifolia
seedbox, bushy seedbox, square-pod water-primrose, rattle-box, seed-box
Family
Onagraceae
Leaf Arrangement
alternate
Leaf Attachment
petiolate, sessile
Leaf Margin
entire
Leaf Type
simple
Leaf Shape
linear, elliptic, lanceolate
Growth Form
forb
Flower Color
yellow
Flower Petals
4
Flower Month
May - October
Height (meters)
0.4 - 1.2
Milky Sap
No
Armed/Unarmed
Unarmed
Origin
native
Lifespan
perennial
Growing Season
Warm season
Leaf Retention
Deciduous
Wetland Class
OBL
Field Characters
The leaves of seedbox are alternate and lanceolate with long petioles (3-10 mm.). Its fruit are rounded, winged cubes with 4 persistent sepals that are 7-10 mm. long.
Habitat
Swamps, wet soils, prairie, ravines, lakeshores, stream banks, roadside ditches, marshes, savannas, low woods.