Hymenothrix

Hymenothrix is a small genus of North American flowering plants in the daisy family known as thimbleheads. They are native to the southwestern United States and northern Mexico.
These are spindly, erect annual, biennial, and perennial herbs with white or yellow flowers.
; Species
The following species are recognised in the genus Hymenothrix:Hymenothrix autumnalis - Coahuila, Nuevo LeónHymenothrix biternata - United States Hymenothrix dissecta - Baja California, Sonora, Chihuahua, Coahuila, United States Hymenothrix glandulopubescens Hymenothrix greenmanii - México StateHymenothrix janakosiana - ChihuahuaHymenothrix loomisii - Loomis's thimblehead - California Nevada Arizona Hymenothrix palmeri - ChihuahuaHymenothrix pedata - Chihuahua, Coahuila, United States Hymenothrix wislizeni - Trans-Pecos thimblehead - Chihuahua, Sonora, Arizona New Mexico Texas Hymenothrix wrightii - Wright's thimblehead - Chihuahua, Baja California, California, Arizona, New Mexico and Texas
; formerly included
Hymenothrix purpurea Brandegee - Florestina purpurea Rydb.