Diplotaxis

Jäger, E.J. 2011: Rothmaler, Exkursionsflora von Deutschland, Gefäßpflanzen: Grundband, ed. 20Tutin, T.G., Burges, N.A., Chater, A.O., Edmondson, J.R., Heywood, V.H., Moore, D.M., Valentine, D.H., Walters, S.M. & Webb, D.A. 1993: Flora Europaea 1, ed. 2
but modified
1Petals 3-4 mm long; outer stamens sterile
1'Petals (4-)5-15 mm long; outer stamens fertile
2Plant perennial; petals (7.5-)8-15 mm long; stem without rosette, usually branched, 3-6 cauline leaves
2'Plant annual or biennial, rarely perennial; petals (4-)5-8(-8.5) mm long; scapose or subscapose, basal leaves forming rosette, 0-3(-4) cauline leaves