Tonestus, common name serpentweed, is a genus of North American flowering plants in the aster family. The name is an anagram of the name of the related genus Stenotus. Nestotus is similarly another anagram of the same name. Species 1. \n* Tonestus eximius (H.M.Hall) A.Nelson & J.F.Macbr. - CA NV 2. \n* Tonestus graniticus (Tiehm & L.M.Shultz) G.L.Nesom & D.R.Morgan - NV 3. \n* Tonestus lyallii (A.Gray) A.Nelson - Alberta, British Columbia, WA OR ID MT CO WY NV CA 4. \n* Tonestus pygmaeus (Torr. & A.Gray) A.Nelson - MT WY CO NMformerly included now in Herrickia Lorandersonia Toiyabea