''Tetraneuris'', commonly known as four-nerve daisy or bitterweed, is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of North American plants in the sneezeweed tribe within the

daisy family The family Asteraceae, alternatively Compositae, consists of over 32,000 known species of flowering plants in over 1,900 genera within the order Asterales. Commonly referred to as the aster, daisy, composite, or sunflower family, Compositae w ...

. The genus includes one annual, ''

Tetraneuris linearifolia ''Tetraneuris linearifolia'' is a North American species of plants in the sunflower family, known by the common name fineleaf fournerved daisy. It grows in the south-central United States (Kansas, Oklahoma, Texas, New Mexico) and northern Mexico ...

'', 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. ; SpeciesFlann, C (ed) 2009+ Global Compositae Checklist
Biota of North America Program 2013 county distribution maps
/ref> * ''

Tetraneuris acaulis ''Tetraneuris acaulis'' is a North American species of flowering plants in the sunflower family.Tetraneuris acaulis'. ITIS.Tetraneuris acaulis Lady Bird Johnson Wildflower Center'', University of Texas.Hymenoxys acaulis'. '' The Jepson Manual, Un ...

'' - western Canada, western USA, northern Mexico * ''

Tetraneuris argentea ''Tetraneuris argentea'', the perkysue, is a North American species of plants in the sunflower family. It grows in the southwestern United States, primarily in Arizona and New Mexico with additional populations in Utah, Colorado, and the Texas Pa ...

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Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a U.S. state, state in the Southwestern United States. It is the list of U.S. states and territories by area, 6th largest and the list of U.S. states and territories by population, 14 ...

New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe, New Mexico, Santa Fe , LargestCity = Albuquerque, New Mexico, Albuquerque , LargestMetro = Albuquerque metropolitan area, Tiguex , Offi ...

* ''

Tetraneuris herbacea ''Tetraneuris herbacea''''T. herbacea''.
ITIS.

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Ontario Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central C ...

Michigan Michigan () is a U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the List of U.S. states and ...

Ohio Ohio () is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Of the List of states and territories of the United States, fifty U.S. states, it is the List of U.S. states and territories by area, 34th-l ...

Illinois Illinois ( ) is a state in the Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria and Roc ...

* ''

Tetraneuris ivesiana ''Tetraneuris ivesiana'' is a North American species of plants in the sunflower family, known by the common name Ives' fournerved daisy. It grows in the southwestern United States, in Arizona, New Mexico, Utah, Colorado. ''Tetraneuris ivesiana'' ...

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Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to its ...

Colorado Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...

* ''

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Tamaulipas Tamaulipas (), officially the Free and Sovereign State of Tamaulipas ( es, Estado Libre y Soberano de Tamaulipas), is a state in the northeast region of Mexico; one of the 31 states which, along with Mexico City, comprise the 32 Federal Entiti ...

Coahuila Coahuila (), formally Coahuila de Zaragoza (), officially the Free and Sovereign State of Coahuila de Zaragoza ( es, Estado Libre y Soberano de Coahuila de Zaragoza), is one of the 32 states of Mexico. Coahuila borders the Mexican states of N ...

Nuevo León Nuevo León () is a state in the northeast region of Mexico. The state was named after the New Kingdom of León, an administrative territory from the Viceroyalty of New Spain, itself was named after the historic Spanish Kingdom of León. With ...

Kansas Kansas () is a state in the Midwestern United States. Its capital is Topeka, and its largest city is Wichita. Kansas is a landlocked state bordered by Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to ...

Oklahoma

Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...

* ''

Tetraneuris scaposa ''Tetraneuris scaposa'' (common names stemmy four-nerve daisy and stemmy hymenoxys) is a North American species of plants in the sunflower family. It grows in the southwestern and south-central United States (Nebraska, Kansas, Oklahoma, Kansas, ...

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Chihuahua Chihuahua may refer to: Places *Chihuahua (state), a Mexican state **Chihuahua (dog), a breed of dog named after the state **Chihuahua cheese, a type of cheese originating in the state **Chihuahua City, the capital city of the state **Chihuahua Mun ...

, San Luis Potosí,

Zacatecas , image_map = Zacatecas in Mexico (location map scheme).svg , map_caption = State of Zacatecas within Mexico , coordinates = , coor_pinpoint = , coordinates_footnotes = , subdivision_type ...

Nebraska Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the so ...

Oklahoma

* ''

Tetraneuris torreyana ''Tetraneuris torreyana'' is a North American species of plants in the sunflower family, known by the common name Torrey's four-nerve daisy. It grows in the western United States, in extreme southern Montana, Arizona, New Mexico, Utah, Color ...

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Wyoming Wyoming () is a state in the Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the southwest, and Colorado to the sou ...

Montana Montana () is a U.S. state, state in the Mountain states, Mountain West List of regions of the United States#Census Bureau-designated regions and divisions, division of the Western United States. It is bordered by Idaho to the west, North ...

* '' Tetraneuris turneri'' -

* ''

Tetraneuris verdiensis ''Tetraneuris verdiensis'' is a rare North American species of plants in the sunflower family. It has been found in only in Yavapai County in Arizona in the southwestern United States. ''Tetraneuris verdiensis'' is a small perennial herb rarely ...

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; formerly included see ''

Hymenoxys ''Hymenoxys'' (rubberweed or bitterweed) is a genus of plants in the sunflower family, native to North and South America. It was named by Alexandre Henri Gabriel de Cassini in 1828. Plants of this genus are toxic to sheep due to the presence of ...

'' * ''Tetraneuris brandegeei -

Hymenoxys brandegeei ''Hymenoxys brandegeei'' is a species of flowering plant in the daisy family known by the common names Brandegee's four-nerve daisy, Brandegee's rubberweed or western bitterweed. It is native to the states of Arizona, Colorado, and New Mexico in ...

'' * ''Tetraneuris grandiflora -

Hymenoxys grandiflora ''Hymenoxys grandiflora'' is a North American species of flowering plant in the daisy family known by the common names graylocks four-nerve daisy, graylocks rubberweed, or old man of the mountain. It is native to high elevations in the Rocky Moun ...

References

* Asteraceae genera Flora of North America Taxa named by Edward Lee Greene {{Helenieae-stub