Tetragonotheca

Familia: Asteraceae
Subfamilia: Asteroideae
Tribus: Millerieae
Subtribus: Dyscritothamninae
Genus:
Species: T. helianthoides – T. ludoviciana – T. repanda – T. texana

Tetragonotheca L. Sp. Pl. 2: 903. (1753)

• Type species: Tetragonotheca helianthoides L. Sp. Pl. 2: 903. (1753)

• Linnaeus, C. 1753. Species Plantarum. Tomus II: 903. Reference page. 
• Hassler, M. 2018. Tetragonotheca. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2018. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2018 Jan. 29. Reference page. 
• International Plant Names Index. 2018. Tetragonotheca. Published online. Accessed: Jan. 29 2018. Reference page.
• Tropicos.org 2018. Tetragonotheca. Missouri Botanical Garden. Published online. Accessed: 29 Jan. 2018. Reference page.