Ludwigia alternifolia, commonly known as seedbox, bushy seedbox, rattlebox, is a herbaceous perennial plant of the family Onagraceae (evening primrose family). It is native to central and eastern North America, growing in marshes, wet meadows, and swamps. It has yellow, four-petaled flowers and brown seed pods that are shaped like a cube.
Description
Ludwigia alternifolia grows tall on reddish-tinged stems. Leaves are deep green, sharply-pointed, and lance-shaped.
thumb|left|Fruits of Ludwigia alternifolia
Flowers are usually single, growing from the leaf axils on upper leaves. They have four yellow petals and four light green sepals. The mature fruits are brown, cubic capsules with rigid sides, about in length.
Distribution and habitat
left|thumb|Ludwigia alternifolia (Seedbox) winter sowed ON Canada
It is native to southern Quebec and Ontario to Kansas and south to Texas and Florida.