Black knapweed
Centaurea nigra L.
- light
- —
- water
- —
- tall
- 99 cm
- wide
- —
Asteraceae
Also called Lesser Knapweed, Hardheads, Common Knapweed
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
- EuropeKew's checklist, not yet checked
- Height
- 99 cmRead from Wikipedia, one source
- Flowers
- Red, purpleRead from Wikipedia, one source
Not known yet: light, spread, water, coldest it survives, heat, hottest it survives.
In other languages (12)
- root
- CENNI1, Garampayu, Pumar (el)
- French
- Centaurée noire
- German
- Schwarze Flockenblume
- Czech
- chrpa černá
- Danish
- Sorthoved-knopurt
- Norwegian Bokmål
- svartknoppurt
- Finnish
- mustakaunokki
- Japanese
- クロアザミ
- Estonian
- must jumikas
- Dutch
- Zwart knoopkruid
- Chinese (China)
- 黑矢车菊
- Swedish
- svartklint
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-SA 3.0
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC0
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Centaurea nigra (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.