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

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

n plants in the sneezeweed tribe within the

daisy family Asteraceae () is a large family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger fam ...

. The genus includes one annual species, ''

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, 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
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. It is known by many common names in English including stemless four-nerve daisy, stemless hymenoxys, butte marigold, and stemless rubberweed. Descri ...

'' – 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 P ...

'' –

Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...

New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...

* ''

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

'' –

Ontario Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...

Michigan Michigan ( ) is a peninsular U.S. state, state in the Great Lakes region, Great Lakes region of the Upper Midwest, Upper Midwestern United States. It shares water and land boundaries with Minnesota to the northwest, Wisconsin to the west, ...

Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash River, Wabash and Ohio River, Ohio rivers to its ...

* ''

Tetraneuris ivesiana ''Tetraneuris ivesiana'' is a North American species of flowering plant in the sunflower family, known by the common name Ives' fournerved daisy. It grows in the southwestern United States, in Arizona, New Mexico, Utah, and Colorado. ''T. ivesia ...

'' –

Utah Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...

Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...

* ''

'' -

Tamaulipas Tamaulipas, officially the Free and Sovereign State of Tamaulipas, is a state in Mexico; one of the 31 states which, along with Mexico City, comprise the 32 federal entities of Mexico. It is divided into 43 municipalities. It is located in nor ...

Coahuila Coahuila, formally Coahuila de Zaragoza, officially the Free and Sovereign State of Coahuila de Zaragoza, is one of the 31 states of Mexico. The largest city and State Capital is the city of Saltillo; the second largest is Torreón and the thi ...

Nuevo León Nuevo León, officially the Free and Sovereign State of Nuevo León, is a Administrative divisions of Mexico, state in northeastern Mexico. The state borders the Mexican states of Tamaulipas, Coahuila, Zacatecas, and San Luis Potosí, San Luis ...

Kansas Kansas ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to the west. Kansas is named a ...

Oklahoma Oklahoma ( ; Choctaw language, Choctaw: , ) is a landlocked U.S. state, state in the South Central United States, South Central region of the United States. It borders Texas to the south and west, Kansas to the north, Missouri to the northea ...

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

* ''

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

'' – Chihuahua,

San Luis Potosí San Luis Potosí, officially the Free and Sovereign State of San Luis Potosí, is one of the 32 states which compose the Federal Entities of Mexico. It is divided in 59 municipalities and is named after its capital city, San Luis Potosí. It ...

Zacatecas Zacatecas, officially the Free and Sovereign State of Zacatecas, is one of the Political divisions of Mexico, 31 states of Mexico. It is divided into Municipalities of Zacatecas, 58 municipalities and its capital city is Zacatecas City, Zacatec ...

Nebraska Nebraska ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Ka ...

* ''

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, Colorado, ...

'' –

Wyoming Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...

Montana Montana ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Idaho to the west, North Dakota to the east, South Dakota to the southeast, Wyoming to the south, an ...

* '' Tetraneuris turneri'' –

* '' Tetraneuris verdiensis'' –

; 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 Asteraceae, 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 th ...

References

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