Triantha

Triantha is a small genus of flowering plants in the family Tofieldiaceae, first described as a genus in 1879. False asphodel is a common name for plants in this genus.
"Triantha" has four known species. One of these is endemic to Japan. The other three are native to North America.
A comparison of DNA sequences has indicated that "Triantha glutinosa" might be two species.
Before the family Tofieldiaceae was established in 1995, "Triantha" and related genera were usually placed in Nartheciaceae, Liliaceae, or Melanthiaceae, but molecular phylogenetic studies of monocots and Alismatales have shown that inclusion of "Triantha" etc. in these families makes them polyphyletic.
Some authors have included "Triantha" within the genus "Tofieldia". "Triantha" is distinguished from "Tofieldia" by its glandular-pubescent stems and by the presence of seed appendages. In 2011, a study of two nuclear genes and ten chloroplast genes showed that "Triantha" and "Tofieldia" are monophyletic and closely related sister clades. The species of "Triantha" are so closely related that the authors could not resolve any relationships among them.