Conyza laevigata(Rich.) Pruski

manzanilla horseweed

WFO wfo-0000014972 Accepted WFO 2026-06 8 photographs CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Conyza laevigata, photographed by Alexis López Hernández
fig. a Alexis López Hernández, CC BY 4.0 / 2020-04-15 / obs. 67681986
Conyza laevigata, photographed by Alexis López Hernández
fig. b Alexis López Hernández, CC BY 4.0 / obs. 67686406
Conyza laevigata, photographed by Alexis López Hernández
fig. c Alexis López Hernández, CC BY 4.0 / obs. 67681319
Conyza laevigata, photographed by Alexis López Hernández
fig. d Alexis López Hernández, CC BY 4.0 / obs. 66827428
Conyza laevigata, photographed by Alexis López Hernández
fig. e Alexis López Hernández, CC BY 4.0 / obs. 66828458
Conyza laevigata, photographed by Alexis López Hernández
fig. f Alexis López Hernández, CC BY 4.0 / obs. 66873018
Conyza laevigata, photographed by Alexis López Hernández
fig. g Alexis López Hernández, CC BY 4.0 / obs. 66872668
Conyza laevigata, photographed by Obed Palagot Echavarria
fig. h Obed Palagot Echavarria, CC BY-SA 4.0 / obs. 126377731

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 32 botanical countries

Regions where Conyza laevigata is native: Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Argentina Northeast, Argentina Northwest, Argentina South, Bahamas, Belize, Bolivia, Brazil North, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, French Guiana, Guatemala, Haiti, Honduras, Leeward Is., Nicaragua, Panamá, Peru, Puerto Rico, Trinidad-Tobago, Venezuela, Venezuelan Antilles, Windward Is. Mexico CentralMexico GulfMexico NortheastMexico NorthwestMexico SoutheastMexico SouthwestArgentina NortheastArgentina NorthwestArgentina SouthBelizeBoliviaBrazil NorthColombiaCosta RicaCubaDominican RepublicEcuadorEl SalvadorFrench GuianaGuatemalaHaitiHondurasNicaraguaPanamáPeruPuerto RicoTrinidad-TobagoVenezuela BahamasLeeward Is.Venezuelan AntillesWindward Is.
Native distribution of Conyza laevigata, 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. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Argentina Northeast AGE SOUTHERN AMERICA
Argentina Northwest AGW
Argentina South AGS
Bahamas BAH
Belize BLZ
Bolivia BOL
Brazil North BZN
Colombia CLM
Costa Rica COS
Cuba CUB
Dominican Republic DOM
Ecuador ECU
El Salvador ELS
French Guiana FRG
Guatemala GUA
Haiti HAI
Honduras HON
Leeward Is. LEE
Nicaragua NIC
Panamá PAN
Peru PER
Puerto Rico PUE
Trinidad-Tobago TRT
Venezuela VEN
Venezuelan Antilles VNA
Windward Is. WIN
Mexico Central MXC NORTHERN AMERICA
Mexico Gulf MXG
Mexico Northeast MXE
Mexico Northwest MXN
Mexico Southeast MXT
Mexico Southwest MXS

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 8 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.

  • Conyza apurensis Kunth
  • Conyza apurensis var. apurensis
  • Conyza subspathulata Cronquist
  • Dimorphanthes chinensis (Jacq.) Cass.
  • Erigeron chinensis Jacq.
  • Erigeron laevigatus Rich.
  • Erigeron spathulatus Vahl
  • Leptilon chinense (Jacq.) Britton

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.