Ptilotrichum cretaceum (Adams) Ledeb. Dataset Update on the Brassicaceae Species Checklist Rank SPECIES Published in Ledebour, C.F. von. Fl. Ross. 1: 143. (1841). Classification family Brassicaceae genus Stevenia species Stevenia canescens Name Homonyms Ptilotrichum cretaceum (Adams) Ledeb.