Austrian Fieldcress ( Rorippa austriaca (Crantz) Bess.)
Austrian fieldcress is a more recent invasive plant in Sublette County. Early detection of this plant by weed & pest officials is vital to preventing this invasive plant from taking hold.
Austrian fieldcress is identifiable by erect smooth stems that branch at the top. Leaves are narrow and oblong, arranged alternately along the stem. The leaves are distinct because of their toothed edges and bases that clasp the stem. The yellow flowers grow in loose clusters at the tips of branches. They have four small petals and six stamens. The small, rough, brown to black seeds generally do not develop at our elevation with a short growing season. This plant mainly reproduces vegetatively by creeping roots, and rarely by seed.