''Tetraneuris linearifolia'' is a North American species of plants in the

sunflower 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 ...

, known by the common name fineleaf fournerved daisy. It grows in the south-central United States (

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 ...

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 ...

) and northern Mexico (

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 ...

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 ...

). ''Tetraneuris linearifolia'' is an annual herb up to tall. It forms a branching underground

caudex A caudex (: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is most ...

sometimes producing as many as 10 above-ground stems. One plant can produce as many as 80 flower heads. Each head has 9–25 yellow ray flowers surrounding 50-200 yellow disc flowers.Hooker, William Jackson. 1837. Icones Plantarum 2: plate 146 + subsequent unnumbered text page
full-page line drawing of ''Tetraneuris linearifolia'' (as ''Hymenoxys linearifolia)'', description in Latin, commentary and figure captions in English

References

External links

Photo of herbarium specimen collected in Nuevo León in 1984
linearifolia Flora of Northeastern Mexico Flora of the Great Plains (North America) Flora of the United States Flora of the South-Central United States Plants described in 1836 Taxa named by Edward Lee Greene {{medicinal-plant-stub