Other names: Charlock or kaber mustard, canola, rapeseed
Life cycle: Winter annual, but sometimes a summer annual
Found in: Throughout the U.S. in winter small grains and nurseries.
General description: Lush leafy green plant with yellow flowers.
Seedlings: Cotyledons are kidney- or heart-shaped with indentations at the tip.
True leaves: Alternate, egg-shaped and up to 8" long. Lower leaves form a rosette and are irregularly lobed with toothed edges. Upper leaves are smaller, unlobed and sometimes clasp the stem.
Flowers and fruit: Flowers are yellow and bloom in clusters at the end of branches. Fruit is a 1" to 2" pod that is rounded with a four-angled, flattened beak at the tip.