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, Tetraneuris linearifolia, with all the other species being perennials.

The name is of Greek origin, tetra, four and neuron, nerve, referring to the venation of the rays, which are three-lobed with the outer lobes themselves having an apparent vein down the middle.

1. Tetraneuris acaulis - western Canada, western USA, northern Mexico
2. Tetraneuris argentea - Arizona New Mexico
3. Tetraneuris herbacea - Ontario Michigan Ohio Illinois
4. Tetraneuris ivesiana - Utah Colorado New Mexico Arizona
5. Tetraneuris linearifolia - Tamaulipas, Coahuila, Nuevo León, Kansas Oklahoma Texas New Mexico
6. Tetraneuris scaposa - Chihuahua, Tamaulipas, Coahuila, Nuevo León, San Luis Potosí, Zacatecas, Nebraska Kansas Oklahoma Texas Colorado New Mexico
7. Tetraneuris torreyana - Arizona New Mexico Utah Colorado Wyoming Montana
8. Tetraneuris turneri - Coahuila, Texas
9. Tetraneuris verdiensis - Arizona

see Hymenoxys