Tropical horseweed
Erigeron sumatrensis Retz.
- light
- —
- water
- —
- tall
- 1.5 m
- wide
- —
Asteraceae
Also called Guernsey Fleabane, Tall Fleabane, Broad Leaved Fleabane, High Fleabane, Sumatran fleabane
Formerly Aster ambiguus, Conyza altissima, Conyza ambigua, Conyza daveauana, and 14 more
When it flowers
Not known yet in the tropics: too few flowering observations to read a season from.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- AnnualKew's checklist, not yet checked
- Climate
- SubtropicalKew's checklist, not yet checked
- Wild in
- Mexico to S. Trop. AmericaKew's checklist, not yet checked
- Height
- 99 cm to 2.0 mRead from Wikipedia, one source
- Flowers
- WhiteRead from Wikipedia, one source
Not known yet: light, spread, water, coldest it survives, heat, hottest it survives.
In other languages (12)
- French
- Érigéron de Sumatra, Vergerette de Sumatra, Vergerette de Barcelone
- Portuguese
- Avoadinha-marfim
- Chinese
- 蘇門白酒草, 野茼蒿, 竹叶艾
- Italian
- Saeppola di Naudin
- Japanese
- オオアレチノギク
- Russian
- Мелколепестничек суматранский
- Dutch
- hoge fijnstraal
- Indonesian
- Jelantir
- Chinese (China)
- 苏门白酒草
- German
- Sumatra-Berufkraut, Weisses Berufskraut
- Korean
- 큰망초
- Slovenian
- belkasta hudoletnica
Where this comes from
- iNaturalist, read 2026-10-25, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-25, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, CC BY 2.0
- iNaturalist, read 2026-10-25, CC0
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Erigeron sumatrensis (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.