Invasive:  Yellow archangel (Lamiastrum galeobdolon) Characteristics:  Yellow archangel, or yellow Lamium, is a fast-growing, rhizomatous, trailing (sometimes upright) perennial ground cover.  Stems are square in cross-section, and are typically less […]

Invasive:  Italian Arum (Arum italicum) Characteristics: Italian Arum—a.k.a. Lords and Ladies—is a tuberous perennial, growing to 12 inches high.  It has glossy, arrow-shaped leaves up to 14 inches long, with

Weed of the Month:  Lesser celandine (Ficaria verna, formerly Ranunculus ficaria) Characteristics:  Lesser celandine, also known as fig buttercup, is an herbaceous, perennial plant. Plants have a basal rosette of

Invasive:  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 year,

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, gathered its fruit on a summer