World Register of Marine Species (WoRMS)
Machaeranthera sect. Psilactis (A.Gray) B.L.Turner & D.B.Horne
Compositae Working Group (CWG) (2026). Global Compositae Database. Machaeranthera sect. Psilactis (A.Gray) B.L.Turner & D.B.Horne. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1079421 on 2026-08-28
(1849). Mem. Amer. Acad. Arts ser. 2, 4(1)