Thelesperma megapotamicum(Spreng.) Kuntze

Hopi tea greenthread

WFO wfo-0000019734 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Thelesperma megapotamicum, photographed by bmasinton
fig. a bmasinton, CC BY-SA 4.0 / 2022-06-07 / obs. 204206321
Thelesperma megapotamicum, photographed by Elliott Gordon
fig. b Elliott Gordon, CC BY 4.0 / obs. 203269295
Thelesperma megapotamicum, photographed by Andrew Tree
fig. c Andrew Tree, CC BY 4.0 / obs. 200518357
Thelesperma megapotamicum, photographed by Reid Hardin
fig. d Reid Hardin, CC BY 4.0 / obs. 200607412
Thelesperma megapotamicum, photographed by Hugo Hulsberg
fig. e Hugo Hulsberg, CC0 1.0 / obs. 182982898
Thelesperma megapotamicum, photographed by veonatura
fig. f veonatura, CC BY 4.0 / obs. 195199704
Thelesperma megapotamicum, photographed by Bobby McCabe
fig. g Bobby McCabe, CC BY 4.0 / obs. 161875581
Thelesperma megapotamicum, photographed by Leticia Jiménez Hernández
fig. h Leticia Jiménez Hernández, CC BY-SA 4.0 / obs. 147682487

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 17 botanical countries

Regions where Thelesperma megapotamicum is native: Arizona, Arkansas, Colorado, Kansas, Mexico Northeast, Mexico Northwest, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, Utah, Wyoming, Argentina Northeast, Argentina Northwest, Argentina South, Uruguay ArizonaArkansasColoradoKansasMexico NortheastMexico NorthwestNebraskaNew MexicoOklahomaSouth DakotaTexasUtahWyomingArgentina NortheastArgentina NorthwestArgentina SouthUruguay
Native distribution of Thelesperma megapotamicum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Arizona ARI NORTHERN AMERICA
Arkansas ARK
Colorado COL
Kansas KAN
Mexico Northeast MXE
Mexico Northwest MXN
Nebraska NEB
New Mexico NWM
Oklahoma OKL
South Dakota SDA
Texas TEX
Utah UTA
Wyoming WYO
Argentina Northeast AGE SOUTHERN AMERICA
Argentina Northwest AGW
Argentina South AGS
Uruguay URU

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 10 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Bidens gracilis Torr.
  • Bidens leyboldii Phil.
  • Bidens megapotamica Spreng.
  • Bidens paradoxa D.Don ex Hook. & Arn.
  • Cosmidium gracile (Torr.) Nutt.
  • Isostigma megapotamicum (Spreng.) Sherff
  • Thelesperma gracile (Torr.) A.Gray
  • Thelesperma megapotamicum (Spreng.) Herter
  • Thelesperma ramosius S.F.Blake
  • Thelesperma scabiosioides Less.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.