Elongated Mustard
Brassica elongata

Adult
elongated mustard
Native to Eurasia, this plant can be either a winter annual, a biennial or a perennial. It grow to 3' tall.
Rosette
elongated mustard
Leaves are slightly toothed with a prominant midvein.
Flower
elongated mustard
Bright yellow flowers have 4 petals and grow in clusters along the stems.
Seed
elongated mustard
Seeds form in 1" to 1.5" seed pods.