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Noxious Weed Control Board
Terrible 10 - Hairy Willow-herb
Terrible 10 – Hairy Willow-Herb
Hairy willow-herb (Epilobium hirsutum)
Found in moist areas, ditches and shorelines, low areas in pastures; prefers sun but can be shade tolerant.
A semi-aquatic plant that can reach 6 ft high, leaves long and narrow (willow shaped) and toothed attach directly to stem; leaves and stems are covered with downy hair. Bright pink flowers with white centers appear in summer, and long slender seed pods burst to release seeds. Resembles native fireweed.
Native to Europe, hairy willow-herb escaped from cultivation.
Replaces native wetland plants depriving birds and animals of food and habitat; dense stands can impede stream flow with serious impact on watershed. Spreads aggressively by seed and rhizome.
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