Rorippa sessiliflora, commonly known as stalkless yellowcress, is a species of flowering plant in the family Brassicaceae (conserved name Cruciferae) .

[3] The northerly distribution limit coincides with the southern edge of the Wisconsin glaciation, with the occasional collections from previously glaciated areas further north and in Massachusetts possibly attributable to anthropogenic dispersal.

[3] The species grows in areas that are muddy and subject to disturbance, such as on banks of streams, ponds and lakes, as well as on roadsides, and fallow fields.

[1][3][4] Stuckey notes other distinctive features for this species as compared to other members of the genus Rorippa, including thick siliques that are wedge-shaped at the base.

[4] Stuckey indicates that the flowers may deviate from typical traits of crucifers, with variable numbers of stamen (3–6) within a plant and occasional anther fusion.