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.^[2]

Hymenothrix
Hymenothrix dissecta
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Subfamily:	Asteroideae
Tribe:	Bahieae
Genus:	Hymenothrix Gray
Synonyms[1]
Amauriopsis Rydb. Hutchinsonia M.E.Jones 1933, illegitimate homonym not Robyns 1928 (Rubiaceae) Trichymenia Rydb.

These are spindly, erect annual, biennial, and perennial herbs with white or yellow flowers.^[3]

Species

The following species are recognised in the genus Hymenothrix:^[1][4][5]

• Hymenothrix autumnalis - Coahuila, Nuevo León
• Hymenothrix biternata - United States (Arizona New Mexico)
• Hymenothrix dissecta - Baja California, Sonora, Chihuahua, Coahuila, United States (California Arizona New Mexico Texas Nevada Utah Colorado Wyoming South Dakota)
• Hymenothrix glandulopubescens
• Hymenothrix greenmanii - México State
• Hymenothrix janakosiana - Chihuahua
• Hymenothrix loomisii - Loomis's thimblehead - California Nevada Arizona
• Hymenothrix palmeri - Chihuahua
• Hymenothrix pedata - Chihuahua, Coahuila, United States (New Mexico Texas)
• 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 (Brandegee) Rydb.