Colors

Data mode

Account

Login
Sign up

Collapse this

Support the Flora of the Southeastern US

2024 has been a banner year for making the best flora we can imagine. We've created:
With financial support from people like you, we are aiming even higher in 2025. Together we can accomplish all this: Vote on our 2025 priorities
  • Add Global Conservation Ranks (GRanks) vote
  • Professional graphic keys (polyclaves) to individual families/genera vote
  • 2 new FloraQuest apps: Florida & Mid-South vote
  • Image overlays highlighting diagnostic characters with arrows vote
  • iNaturalist integration in FloraQuest vote
Write-in vote: vote
We've set a goal of recruiting 200 ongoing supporters to donate $15 or more each month in 2025. Please help us reach this goal and make next year's flora even better:
Copy permalink to share

*Erigeron bonariensis Linnaeus. South American Horseweed. Phen: Apr-Oct. Hab: Fields, disturbed areas. Dist: Apparently native of South America. Se. VA south into the tropics.

Origin/Endemic status: South America

Synonymy : = F, K3, K4, RAB; = Conyza bonariensis (L.) Cronquist – Ar, Bah, C, Fl7, FNA20, K2, SE1, Tx, Va, WH3; = Conyza floribunda Kunth – G, misapplied; = Leptolon bonariensis (L.) Small; ? Conyza ambigua DC.; > Leptilon bonariense (L.) Small – S; > Leptilon linifolium (Willd.) Small – S

Links to other floras: = Conyza bonariensis - FNA20; = Conyza bonariensis - FNA20

Show in key(s)

Show parent genus

Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACU
  • Eastern Mountains and Piedmont: FACU
  • Great Plains: FACU

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Lowell Urbatsch | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Alan Weakley source | Original Image ⭷

Feedback

See something wrong or missing on about Erigeron bonariensis? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.