Native to the United States.
A biennial or short-lived perennial. Most likely to be found in moist areas such as roadside ditches and ditch banks. Occasionally also occurs in orchards and vineyards where non-tillage management is used.
Seeds germinate from early spring to early summer and the plants mature throughout the summer.
Mature plants can grow up to 6 feet tall, with erect, thick, reddish stems with very few branches. The bright yellow flowers are large – over 2 inches wide – and are borne on the tips of the branches.
Leaves along the base and stem are up to 8 inches long and lance-shaped. Leaves that grow just below the flowers tend to be much smaller and more bract like.
Characteristicts Important to Control:
Not a big problem, and tillage of soil may control it.