What’s That Weed?
Introduced species: Giant hogweed (Heracleum mantegazzianum) Characteristics: Giant hogweed is a very large member of the carrot family, reaching as much as 4.5 m (15 ft) in height. First-year growth […]
Introduced species: Giant hogweed (Heracleum mantegazzianum) Characteristics: Giant hogweed is a very large member of the carrot family, reaching as much as 4.5 m (15 ft) in height. First-year growth […]
Introduced species: Thistles–“Canada” and bull thistle (Circium arvense and C. vulgare), Italian and Scotch thistles (Carduus pycnocephalus and Onopordum acanthium) Characteristics: Thistles are members of the sunflower (aster) family. Canada (or
Introduced species: Armenian blackberry (Rubus bifrons) This month’s weed is no stranger to anyone who’s spent much time in the Pacific northwest; whether you’ve been scratched by its prodigious thorns*,
Written by Roy Iwai (Multnomah County) and Keri Handaly (City of Gresham) Hello friends, we’re here from Follow the Water, the new statewide clean water campaign for Oregon and SW
Follow the Water – What’s Your Lawn Style? Read More »
Introduced species: Garlic Mustard (Alliaria petiolata) Characteristics: Garlic mustard is an herbaceous “biennial” (more on that in a minute) with a deep, white taproot. The rosettes, formed in the first