Achyronychia cooperi Torr. & A.Gray in Proc. Amer. Acad. Arts 7: 331. 1868 Achyronychia cooperi Torr. & A.Gray in Proc. Amer. Acad. Arts 7: 331. 1868Taxon for this nameAchyronychia cooperi Torr. & A.Gray in Proc. Amer. Acad. Arts 7: 331. 1868