Asteraceae
Common knapweed
Centaurea nigra
- Family
- Asteraceae
- Genus
- Centaurea
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Common names
By language (19)
- Arabic
- قنطريون أسود
- arz
- قنطريون اسود
- Asturian
- Centaura
- Chinese
- 黑矢车菊
- Croatian
- Crnoresa zečina
- Czech
- Chrpa černá
- Dutch
- Zwart knoopkruid
- English
- Common knapweed, Lesser knapweed, Hardhead, Hardhead knapweed
- Finnish
- Mustakaunokki
- German
- Schwarze Flockenblume
- Irish
- Mínscoth
- Italian
- Fiordaliso scuro
- Japanese
- クロアザミ
- kw
- Paderow pronter
- Lithuanian
- Juodoji bajorė
- Norwegian Bokmål
- Svartknoppurt
- Spanish
- Aciano negro, Canamones, Jacea carpetana, Jacea nigra
- Swedish
- Svartklint
- Welsh
- Y bengaled
Synonyms
- Centaurea austriaca Rchb.
- Centaurea austriaca f. austriaca
- Centaurea austriaca subsp. austriaca
- Centaurea babingtonii Lacaita ex Hayek
- Centaurea jacea subsp. nigra (L.) Bonnier & Layens
- Centaurea leucocephala Schur
- Centaurea moritziana Hegetschw.
- Centaurea nervosa Rchb. ex Steud.
- Centaurea nigra f. nigra
- Centaurea nigra var. decipiens Bab.
- Centaurea nigra var. mairei Arènes
- Centaurea nigra var. nigra
- Centaurea nigrescens DC.
- Centaurea nigricans Link ex Spreng.
- Centaurea obscura Jord.
- Centaurea pectinata var. fuscata Rouy
- Centaurea phrygia Lapeyr. ex Willk. & Lange
- Centaurea phrygia var. phrygia
- Centaurea rufescens Noulet ex Nyman
- Cyanus niger Gaertn.
- Cyanus phrygius G.Gaertn., B.Mey. & Scherb.
- Cyanus plumosus Gilib.
- Cyanus pumilus Baumg.
- Phrygia nigra (L.) Gray
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Canada: introduced, Lower 48 states: introduced, St. Pierre and Miquelon: introduced
Photos
Photo: Julie Anne Workman, CC BY-SA 3.0, from Wikimedia Commons Photo: fabien s, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: BerndH, CC BY-SA 3.0, from Wikimedia Commons Photo: 🌴Anxo🌿, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Alex Lomas, CC BY 2.0, from Wikimedia Commons Photo: Céline sonntag, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Joan Simon from Barcelona, España, CC BY-SA 2.0, from Wikimedia Commons Photo: 🌴Anxo🌿, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Joan Simon from Barcelona, España, CC BY-SA 2.0, from Wikimedia Commons Photo: Sue Adamson, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: AnRo0002, CC0, from Wikimedia Commons Photo: David Hocken, CC BY-SA 4.0, from Pl@ntNet via GBIF
More in Centaurea
- CornflowerCentaurea cyanusAsteraceae
- Brownray knapweedCentaurea jaceaAsteraceae
- Blessed thistleCentaurea benedictaAsteraceae
- Greater knapweedCentaurea scabiosaAsteraceae
- Yellow star-thistleCentaurea solstitialisAsteraceae
- Red star-thistleCentaurea calcitrapaAsteraceae
- Maltese star-thistleCentaurea melitensisAsteraceae
- Diffuse knapweedCentaurea diffusaAsteraceae
- Spotted knapweedCentaurea stoebeAsteraceae
- Iberian knapweedCentaurea ibericaAsteraceae
- Bighead knapweedCentaurea macrocephalaAsteraceae
- Wig knapweedCentaurea phrygiaAsteraceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.