black knapweed
Centaurea nigra
Summary 2
Centaurea nigra is a species of flowering plant in the daisy family known by the common names lesser knapweed, common knapweed and black knapweed. A local vernacular name is hardheads.
Sources and Credits
- (c) A Emmerson, some rights reserved (CC BY-NC), uploaded by A Emmerson
- (c) Wikipedia, some rights reserved (CC BY-SA), https://en.wikipedia.org/wiki/Centaurea_nigra
More Info
- iNaturalist.ca taxon page
- Biodiversity Heritage Library
- BOLD Systems BIN search
- Calflora
- CalPhotos
- eFloras.org
- Flora Digital de Portugal
- Flora of North America (beta)
- Global Biodiversity Information Facility (GBIF)
- Go Botany
- HOSTS - a Database of the World's Lepidopteran Hostplants
- IPNI (with links to POWO, WFO, and BHL)
- Jepson eFlora
- NatureServe Explorer 2.0
- NBN Atlas
- New Zealand Plant Conservation Network
- OregonFlora.org
- SEINet Symbiota portals
- Tropicos
- USDA PLANTS database
- VASCAN by Canadensys
- World Flora Online
