Decodon verticillatus   
Swamp loosestrife or water willow

Decodon verticillatus¨›
Decodon verticillatus¨›
Photo courtesy Renee Brecht
Britton & Brown
Botanical name: Decodon verticillatus 
Common name: Swamp loosestrife or water willow
Group: dicot
Family: Lythraceae (Loosestrife)
Growth type: Shrub, sub-shrub
Duration: Perennial, but woody stems die back over winter.
Origin: native
Plant height: 2 - 8'
Foliage: Stems are 3' to 9' long, wand-like, arching downward, rooting into the ground where they they touch the water or mud. The base of the stems, growing in water or wet sphagnum, are often covered with a leathery or corky growth.

Leaves lanceolate, nearly sessile (without a stalk), and the bark of the submersed part of the stem is spongy-thickened.
Flower: pink, 1/2"
Flowering time: Flowers early August to early September.  Fruits early September into October.
Habitat: Open shallow water, lakes, ponds, marshes and bogs. A wetland obligate species.
Range in New Jersey: statewide
Heritage ranking, if any: n/a
Misc. Note that this is not the invasive species, purple loosestrife (Lythrum salicaria).