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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

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Treatment Species

The city is managing these species for eradication.

Blessed Milk Thistle

Silybum marianum

Giant Hogweed

Heracleum mantegazzianum

Policeman's Helmet

Impatiens glandulifera

Orange Hawkweed

Hieracium auranticum

Goatsrue

Galega officinalis

False-Brome

Brachypodium sylvaticum

Water Primrose

Ludwigia peploides ssp. montevidensis and L. hexapetala

Garlic Mustard

Alliaria petiolata