Draba pycnosperma Fernald & C.H.Knowlt. Dataset Update on the Brassicaceae Species Checklist Rank SPECIES Published in Fernald, M.L. & Knowlton, C.H. Rhodora 7: 67. (1905). Classification family Brassicaceae genus Draba species Draba pycnosperma Name Homonyms Draba pycnosperma Fernald & C.H.Knowlt. Draba pycnosperma Fernald & Knowlton