About Tonestus pygmaeus (Torr. & A.Gray) A.Nelson
Tonestus pygmaeus, commonly known as pygmy serpentweed or pygmy goldenweed, is a species of flowering plant that belongs to the family Asteraceae. This species is endemic to the western United States, and it has been recorded in the states of New Mexico, Colorado, Wyoming, and Montana. All confirmed records of pygmy serpentweed occurring in Montana are based exclusively on historical specimens.