Erigeron floribundus(Kunth) Sch.Bip.

asthmaweed

WFO wfo-0000021259 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Erigeron floribundus, photographed by Daniel Cahen
fig. a Daniel Cahen, CC BY 4.0 / 2021-09-17 / obs. 158096686
Erigeron floribundus, photographed by Daniel Cahen
fig. b Daniel Cahen, CC BY 4.0 / obs. 147531607
Erigeron floribundus, photographed by Robert H. Wardell
fig. c Robert H. Wardell, CC0 1.0 / obs. 147280204
Erigeron floribundus, photographed by Daniel Cahen
fig. d Daniel Cahen, CC BY 4.0 / obs. 143945179
Erigeron floribundus, photographed by Robert H. Wardell
fig. e Robert H. Wardell, CC0 1.0 / obs. 110509998
Erigeron floribundus, photographed by Robert H. Wardell
fig. f Robert H. Wardell, CC0 1.0 / obs. 110014213
Erigeron floribundus, photographed by Robert H. Wardell
fig. g Robert H. Wardell, CC0 1.0 / obs. 109193718
Erigeron floribundus, photographed by Robert H. Wardell
fig. h Robert H. Wardell, CC0 1.0 / obs. 97352242

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 28 botanical countries

Regions where Erigeron floribundus is native: Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Argentina Northeast, Argentina Northwest, Argentina South, Bolivia, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Chile Central, Chile North, Chile South, Colombia, Costa Rica, Ecuador, Guatemala, Honduras, Nicaragua, Panamá, Paraguay, Peru, Trinidad-Tobago, Uruguay, Venezuela Mexico CentralMexico GulfMexico NortheastMexico SoutheastMexico SouthwestArgentina NortheastArgentina NorthwestArgentina SouthBoliviaBrazil NortheastBrazil SouthBrazil SoutheastBrazil West-CentralChile CentralChile NorthChile SouthColombiaCosta RicaEcuadorGuatemalaHondurasNicaraguaPanamáParaguayPeruTrinidad-TobagoUruguayVenezuela
Native distribution of Erigeron floribundus, 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
Argentina Northeast AGE SOUTHERN AMERICA
Argentina Northwest AGW
Argentina South AGS
Bolivia BOL
Brazil Northeast BZE
Brazil South BZS
Brazil Southeast BZL
Brazil West-Central BZC
Chile Central CLC
Chile North CLN
Chile South CLS
Colombia CLM
Costa Rica COS
Ecuador ECU
Guatemala GUA
Honduras HON
Nicaragua NIC
Panamá PAN
Paraguay PAR
Peru PER
Trinidad-Tobago TRT
Uruguay URU
Venezuela VEN
Mexico Central MXC NORTHERN AMERICA
Mexico Gulf MXG
Mexico Northeast MXE
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.

Where it actually grows measured, from 407 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 1.2 °C 3.0 °C 5.9 °C
Warmest month, mean daily high 18.3 °C 20.3 °C 23.9 °C
Annual rainfall 657 mm 816 mm 1,308 mm
Rainfall in the driest quarter 134 mm 150 mm 219 mm

It is found where winters are cool but frost is light or absent. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 407 research-grade observations of Erigeron floribundus that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 13 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 bonariensis var. leiotheca (S.F.Blake) Cuatrec.
  • Conyza elata Kunth & C.D.Bouché
  • Conyza floribunda Kunth
  • Conyza floribunda var. floribunda
  • Conyza floribunda var. laciniata Cabrera ex G.M.Barroso
  • Conyza myriocephala J.Rémy
  • Conyza sumatrensis var. floribunda (Kunth) J.B.Marshall
  • Conyza sumatrensis var. leiotheca (S.F.Blake) Pruski & G.Sancho
  • Erigeron bonariensis var. floribundus (Kunth) Cuatrec.
  • Erigeron bonariensis var. leiothecus S.F.Blake
  • Erigeron myriocephalus (J.Rémy) Herter
  • Marsea bonariensis var. leiotheca (S.F.Blake) V.M.Badillo
  • Placus floresiana Kuntze

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. USDA PLANTS Database. common name, checklist symbol COFL. public domain. 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.