Grindelia integrifolia, common name Puget Sound gumweed, is a plant species known only from Oregon, Washington and British Columbia. It grows in wet meadows and marshlands.Grindelia integrifolia is a perennial herb up to 100 cm (40 inches) tall. It has narrow, lanceolate leaves up to 8 cm (3.2 inches) long and yellow flower heads arranged like a corymb.