Other names: Narrowleaf dock, sour dock, yellow dock
Life cycle: Perennial
Found in: Commonly found in small grains, pastures and uncultivated areas throughout the U.S.
General description: Large plant with wavy narrow leaves and a sparse flowering stem.
Seedlings: Hairless, ovate cotyledons with long, ridged petioles.
True leaves: Young leaves form into a basal rosette. They are alternate and have an ocrea (a fine papery sheath that covers the petiole). Mature leaves are large, long and rounded with wavy margins.
Flowers and fruit: Flowers bloom in clusters toward the top of a long stem. They are green but turn deep red when mature. Fruits are triangular and corklike.