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Species
Information
- policeman's helmet (ornamental jewelweed)
- Impatiens glandulifera Royle
- USDA
Symbol: IMGL
- Oregon
Noxious Weed Designation: B
- Pictures
Identification: Annual; blooms June to October. Grows 3 to 10 ft tall. Stems hollow, upright, easily broken and have a purplish tinge. Leaves opposite or whorled with (usually) three leaves to a node; shape oblong, ovate or elliptic; margins sharply serrate and petioles have small glandular stalks at base. Flowers in groups of 4 to 8 at ends of stalks. Petals are fused into a tube and are showy lavender to white. Seed capsules enlongated and explode upon touch when mature.
Impacts: Policeman's helmet forms dense stands along river systems and moist lowlands, excluding native forbs.
Biological
Controls: No approved biological control agent is available.
Oregon
Maps of Policeman's Helmet Distribution
Links:
USDA
Plants Database information on policeman's helmet
GRIN
Database information on policeman's helmet
Oregon Department
of Agriculture information on policeman's helmet
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