Amphiachyris (DC.) Nutt.
Amphiachyris is a genus of two species. Both are native to North America.
Literature:
Lane M.A. (1979) Taxonomy of the genus Amphiachyris (Asteraceae: Astereae). Syst. Bot. 4: 178-189.
Nesom G.L. (2006) Amphiachyris. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 20. Oxford University Press, New York-Oxford: 87-88.
Nesom G.L. (2007) Notes on the disarticulation of Xylothamia (Asteraceae: Astereae). J. Bot. Res. Inst. Texas 1:145-148.
Suh Y. & Simpson B.B. (1990) Phylogenetic Analysis of Chloroplast DNA in North American Gutierrezia and Related Genera (Asteraceae: Astereae). Syst. Bot. 15(4): 660-670.
Urbatsch L.E., Roberts R.P. & Karaman V. (2003) Phylogenetic evaluation of Xylothamia, Gundlachia, and related genera (Asteraceae, Astereae) based on ETS and ITS nrDNA sequence data. Am. J. Bot. 90(4): 634-649.