Thelesperma

Thelesperma is a genus of North American and South American plants in the cosmos tribe within the sunflower family. Greenthread is a common name for plants in this genus.

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. The genus is closely related to parts of Coreopsis and to certain North American Bidens species (including Bidens coronata and Bidens comosa).

1. Thelesperma ambiguum - TX NM
2. Thelesperma burridgeanum - TX
3. Thelesperma filifolium - Coahuila, Nuevo León, AZ NM TX LA MS AL AR MO OK KS CO WY NE SD
4. Thelesperma flavodisum - TX LA AR
5. Thelesperma graminiformis - Nuevo León
6. Thelesperma longipes - Coahuila, Nuevo León, Tamaulipas, San Luis Potosí, AZ NM TX
7. Thelesperma megapotamicum - Argentina, Chihuahua, Coahuila, Nuevo León, CA OR AZ NM TX UT CO KS MO WY SD MN IL IN MI
8. Thelesperma muelleri - Nuevo León
9. Thelesperma nuecense - TX
10. Thelesperma scabridulum - Nuevo León
11. Thelesperma simplicifolium - NM TX Coahuila, Nuevo León, Tamaulipas, Durango, Zacatecas
12. Thelesperma subaequale - Nuevo León
13. Thelesperma subnudum - ALB SAS ND MT WY CO NM UT NV AZ
14. Thelesperma subsimplicifolium