Cotyledons
Spoon-shaped to oval,
tapering to stalk
Notched tip at terminal end

Roots
Fibrous taproot

Stems
Erect, rough due to two-branched hairs
Stem usually branched

True Leaves
Alternate, nearly linear
Tapered at both ends
Three-branched hairs on leaves
Margins wavy

Flowers
Small, pale yellow four petals
Pods erect nearly parallel to stem

Habitat
Cultivated fields, grain fields
Waste areas

Note
Plants often purplish at maturity
Mustard seed oil in feed is poisonous