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Hymenoxis acaulis form.jpg
Tetraneuris acaulis in cultivation
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Helenieae[1]
Genus: Tetraneuris
E.L.Greene 1898
Type species
Tetraneuris acaulis
(DC.) E.L.Greene 1898

Rydbergia Greene

Tetraneuris, commonly known as four-nerve daisy[2] or bitterweed, is a genus of North American plants in the sneezeweed tribe within the daisy family.[3][4]

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
formerly included[1]

see Hymenoxys


  1. ^ a b c d Flann, C (ed) 2009+ Global Compositae Checklist
  2. ^ "Tetraneuris". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 9 December 2015. 
  3. ^ Greene, Edward Lee. 1898. Pittonia 3(18A): 265–270 in English
  4. ^ Tropicos, Tetraneuris Greene
  5. ^ The Plant List search for Tetraneuris
  6. ^ Turner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100
  7. ^ Biota of North America Program 2013 county distribution maps