Tetraneuris


Tetraneuris, commonly known as four-nerve daisy or bitterweed, is a genus of North American plants in the sneezeweed tribe within the daisy family.
The genus includes one annual species, Tetraneuris linearifolia, with all the other species being perennials.
The name is of Greek origin, deriving from tetra, meaning "four", and neuron, meaning "nerve", which refers to the venation of the rays: three-lobed with the outer lobes themselves having an apparent vein down the middle.
; SpeciesTetraneuris acaulis – western Canada, western USA, northern MexicoTetraneuris argentea – Arizona, New Mexico Tetraneuris herbacea – Ontario, Michigan, Ohio, Illinois Tetraneuris ivesiana – Utah, Colorado, New Mexico, ArizonaTetraneuris linearifolia - Tamaulipas, Coahuila, Nuevo León, Kansas, Oklahoma, Texas, New MexicoTetraneuris scaposa – Chihuahua, Tamaulipas, Coahuila, Nuevo León, San Luis Potosí, Zacatecas, Nebraska, Kansas, Oklahoma, Texas, Colorado, New MexicoTetraneuris torreyana – Arizona, New Mexico, Utah, Colorado, Wyoming, MontanaTetraneuris turneri – Coahuila, TexasTetraneuris verdiensis – Arizona
; formerly included
see Hymenoxys Tetraneuris brandegeei - Hymenoxys brandegeei