Tetraneuris, commonly known as four-nerve daisy or bitterweed, is a genus of North American plants in the sneezeweed tribe within the daisy family.Greene, Edward Lee. 1898. Pittonia 3(18A): 265–270 in EnglishTropicos, Tetraneuris Greene
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.
SpeciesFlann, C (ed) 2009+ Global Compositae Checklist The Plant List search for TetraneurisTurner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100Biota of North America Program 2013 county distribution maps Tetraneuris acaulis – western Canada, western USA, northern Mexico Tetraneuris argentea – Arizona, New Mexico Tetraneuris herbacea – Ontario, Michigan, Ohio, Illinois Tetraneuris ivesiana – Utah, Colorado, New Mexico, Arizona Tetraneuris linearifolia - Tamaulipas, Coahuila, Nuevo León, Kansas, Oklahoma, Texas, New Mexico Tetraneuris scaposa – Chihuahua, Tamaulipas, Coahuila, Nuevo León, San Luis Potosí, Zacatecas, Nebraska, Kansas, Oklahoma, Texas, Colorado, New Mexico Tetraneuris torreyana – Arizona, New Mexico, Utah, Colorado, Wyoming, Montana Tetraneuris turneri – Coahuila, Texas Tetraneuris verdiensis – Arizona
formerly included see Hymenoxys Tetraneuris brandegeei - Hymenoxys brandegeei Tetraneuris grandiflora - Hymenoxys grandiflora
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