Biscutella didyma subsp. columnae (Ten.) Nyman Dataset Update on the Brassicaceae Species Checklist Rank SUBSPECIES Published in Nyman, C.F. Consp. Fl. Eur.: 59. (1878). Classification family Brassicaceae genus Biscutella Name Homonyms Biscutella didyma var. columnae (Ten.) Halácsy Biscutella didyma subsp. columnae (Ten.) Nyman