Origin:
A native of Europe, now widespread in the United States.
Biology:
An annual reproducing only from seeds, and its spread commonly is with seeds present in feed materials. Seeds are produced from late spring into early summer.
Identification:
Mature plants may be 3 feet in height, with numerous stems coming from the base or off of the main stem. Stems are thin and often with a pink to violet tint. Leaves are long and narrow, without lobes and with smooth margins. They are alternate on the stems and are clasping around the stem at their base. Flowers are in small clusters at the ends of the stems, and are a very pale yellow. The seed pods developing below the flower head are very small and oval, with a long pointed tip.
Characteristicts Important to Control:
An annual producing seeds early in the warm seasons.
