What’s That Weed?
Introduced species: Tree of Heaven (Ailanthus altissima) Characteristics: Tree of Heaven—also called Chinese sumac or stinking sumac—is one of the great misnomers in the plant world. It is a weedy, fast-growing […]
What’s That Weed?
Introduced species: Pokeweed (Phytolacca americana) Characteristics: American pokeweed is a large, smooth, branching herb from a substantial perennial rootstock, with green, red, or purple stems usually reaching about 4-6 feet
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
What’s That Weed?
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
What’s That Weed?
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*,