Psilactis is a genus of North American and South American plants in the aster tribe within the sunflower family which are known by the common name tansyaster. Species 1. \n* Psilactis asteroides A.Gray - AZ NM TX, Chihuahua, Coahuila, Nuevo León, Durango, Jalisco, Aguascalientes, Sonora, Sinaloa, Querétaro, México State, Michoacán 2. \n* Psilactis brevilingulata Sch.Bip. ex Hemsl. - AZ NM TX, Mexico, Colombia, Peru 3. \n* Psilactis gentryi (Standl.) D.R.Morgan - Huachuca Mountains in Arizona, Sonora, Chihuahua, Durango, Hidalgo, México State 4. \n* Psilactis heterocarpa (R.L.Hartm. & M.A.Lane) D.R.Morgan - TX 5. \n* Psilactis odysseus (G.L.Nesom) D.R.Morgan - Nuevo León, Tamaulipasformerly included \n* Psilactis coulteri A.Gray - Machaeranthera coulteri (A.Gray) B.L.Turner & D.B.Horne