KENAI PENINSULA COOPERATIVE WEED MANAGEMENT AREA

Ornamental Jewelweed

       

Ornamental Jewelweed (Impatiens glandulifera) Balsam family

Annual herb with thick, many-branched, hexagonally angled stems which can grow to 10 feet. Stems smooth, multi-branched, with large swollen glands at the nodes. Lower leaves opposite, while upper leaves are whorled with three leaves to a node. Leaves lance-shaped, 6 inches long, from a stout petiole. Leaf margins finely, sharply serrated. Irregular flowers one inch in length, pink-purple to white, with five petals.

Rapidly clogs wetlands and streams. Prolific seed production and aggressive spreader make for difficult control. Unwary gardeners have contributed to its spread into Alaska.

Rare in Kenai Peninsula. Thrives in lowlands, riparian zones, and along beaches.

More information

Distribution

Kenai Peninsula Borough U.S. Forest Service National Park Service U.S. Fish and Wildlife Service Alaska State Parks Kenai Soil and Water Conservation District