Brown knapweed
സെന്റൗറിയ ജാസീ
Centaurea jacea L.
- light
- Full sun
- water
- —
- tall
- 61 cm
- wide
- —
Asteraceae
Also called Brown-ray knapweed, Brown-rayed knapweed, Brownray knapweed, Common knapweed, Hardheads
Formerly Behen jacea, Calcitrapa jacea, Calcitrapa pratensis, Centaurea pratensis, and 3 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
- PerennialKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- Europe to W. Siberia and CaucasusKew's checklist, not yet checked
- Light
- Full sun (6 h or more)Read from Plants for a Future, one source
- Height
- 61 cmRead from Wikipedia and Plants for a Future, checked by a majority of its sourcesBacked by both sources. Sources differ: Wikipedia 20–100 cm; Plants for a Future 0.6–0.6 m
- Flowers
- White, purple, violetRead from Wikipedia, one source
- Coldest it survives
- -15 °C (USDA zone 7b)Read from Plants for a Future, one source
Not known yet: spread, water, heat, hottest it survives.
In other languages (12)
- Dutch
- knoopkruid, Knoopkruid
- Serbian
- Васиљак, Зечина, Различак
- Swedish
- Gulskära, Rödklint
- Turkish
- Çayır peygamber çiçeğ
- Ukrainian
- Волошка лучна
- Veps
- Nitrugižbobaine
- Chinese
- 棕矢车菊, 棕色矢车菊
- Low Saxon
- Harderwieker ruut
- Arabic
- قنطريون بني
- Belarusian
- Васілёк лугавы
- Bulgarian
- ливадна метличина
- Catalan
- centàurea jàcea
Where this comes from
- iNaturalist, read 2026-10-25, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-26, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- Plants for a Future, read 2026-10-26, fact, cited
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, CC BY-SA 4.0
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC0
- iNaturalist, read 2026-10-25, CC BY-SA
- 3D model: Centaurea jacea (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.