Gumweed (Grindelia squarrosa)

Gumweed photograph

Biennial, to 3 feet tall, usually branching. Yellow flower heads at the ends of branches. Curved, sticky bracts at base of flower head, hence the common name. Leaves alternate, toothed, clasping, sticky. Blooms July-August. Sap used by American Indians to treat various respiratory diseases and rashes.