Thelesperma

Thelesperma is a genus of North American and South American plants in the cosmos tribe within the sunflower family.[2][3][4] Greenthread is a common name for plants in this genus.[5]

Thelesperma
Thelesperma filifolium
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Coreopsideae
Genus: Thelesperma
Less.
Type species
Thelesperma scabiosoides
Synonyms[1]
  • Cosmidium Nutt.

Members of the genus are used by a number of the southwestern Native American peoples as an herbal tea; as such, it is sometimes called "Indian tea," "Native American tea," "Native tea," or the name is referenced to the local tribe where the tea was harvested such as "Apache tea," Pueblo tea," "Navajo tea," "Hopi tea," etc. T. megapotamicum contains luteolin.[6] It also appears that many of the species contain a very similar chromatographic profile, and thus may contain very similar profiles of flavenoids.[7] The genus is closely related to parts of Coreopsis and to certain North American Bidens species (including Bidens coronata and Bidens comosa).[8]

Taxonomy

Species

As of July 2023, Plants of the World Online accepts 12 species for this genus:[9]


References
  1. Flann, C (ed) 2009+ Global Compositae Checklist
  2. Lessing, Christian Friedrich. 1831. Linnaea 6(3): 511–513 in Latin
  3. Flora of North America Vol. 21 Page 199 Thelesperma Lessing, Linnaea. 6: 511. 1831.
  4. Hansen, C. J., L. Allphin, and M. D. Windham. 2002. Biosystematic analysis of the Thelesperma subnudum complex (Asteraceae). Sida 20: 71–96.
  5. USDA, NRCS (n.d.). "Thelesperma". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 9 December 2015.
  6. Bruce A. Bohm, Tod F. Stuessy (2001), "Flavonoids of the sunflower family (Asteraceae)", Science, 292, doi:10.1126/science.292.5520.1306a, S2CID 220100522
  7. TE Melchert (1966), "Chemo-Demes of Diploid and Tetraploid Thelesperma Simplicifolium", Am. J. Bot., 53 (10): 1015–1020, doi:10.2307/2440681, JSTOR 2440681
  8. Crawford, D. J.; Mort, M. E. (2005), "Phylogeny of Eastern North American Coreopsis (Asteraceae-Coreopsideae): insights from nuclear and plastid sequences, and comments on character evolution", American Journal of Botany, 92 (2): 330–336, doi:10.3732/ajb.92.2.330, PMID 21652409
  9. "Thelesperma Less. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2023-07-11.


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