Genus: Knoppurtslekta (Centaurea)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Bakketun | Innlandet, Norway | 4 | 2 | 0 | 2013-07-24 | |
| Bergåsen | Vestfold, Norway | 1 | 1 | 1 | 2020-09-04 | |
| Fossveien | Akershus, Norway | 1 | 1 | 1 | 2024-06-06 | |
| Frognerelva | Oslo, Norway | 1 | 1 | 1 | 2020-09-23 | |
| Hustoft gnr. 150/4 | Rogaland, Norway | 16 | 3 | 1 | 2024-07-07 | |
| Nes Verk rundt | Agder, Norway | 2 | 1 | 0 | 2024-05-29 | |
| Rolfsbukta, Fornebu | Akershus, Norway | 2 | 2 | 0 | 2010-08-25 | |
| Skolebakken | Akershus, Norway | 1 | 1 | 1 | 2020-09-11 | |
| Stend | Vestland, Norway | 2 | 1 | 2 | 2017-06-06 | |
| Åsen | Telemark, Norway | 1 | 1 | 0 | 2024-05-27 | |