Dry sunny disturbed soil, often sandy; a European native first collected in Berrien Co. by F. A. Swink & L. A. Masters in 1992. 

This species resembles a large Diplotaxis tenuifolia in general habit, but differs in its longer petals and longer fruits and generally larger size. In flower, the petals have a conspicuous pattern of darker veins especially on older or dried petals; this absent or faint in the Diplotaxis, which also has a shorter stylar beak in fruit (only ca. 1 - 2.6 mm long) while Coincya has a long, indehiscent stylar beak at least 10 mm long.

More details about the occurrence and spread of this species are available in Naczi & Thieret (1996b).