Thelesperma is a genus of North American and South American plants in the cosmos tribe within the sunflower family.Members of the genus are used by a number of the southwestern Native American peoples as a tea; as such, it is sometimes called "Navajo Tea," "Hopi Tea," etc. T. megapotamicum contains luteolin. It also appears that many of the species contain a very similar chromatographic profile, and thus may contain very similar profiles of flavenoids.