Ludwigia alternifolia - Linnaeus
Onagraceae (Evening Primrose) Family
Plant is an upright, smooth perennial with winged or slightly winged stems. Preferred habitat is edge of ponds, lakes and damp thickets. Distribution is throughout the Escambia region.
Leaves are alternate on the stem, consisting of one part, short leaf stalk, widest at middle to lance-like; no teeth and no lobes.
Flowers are solitary in the leaf axil; bisexual; symmetrical in form. Calyx is four-lobed; four yellow petals; four stamens. Flowers occur in the summer and early autumn.
Fruit is a four-angled capsule.
This Seedbox, which is mostly a wetland plant, bears a distinctive, box-like fruit; square on top and filled with many seeds. Other members of this genus do not have these characteristics.