Calflora, a 501c3 non-profit
Distribution by County   92    
Acroptilon repens  (L.) DC.

(not an active name)
Russian knapweed
Acroptilon repens is a perennial herb that is not native to California.
also called Rhaponticum repens
Cal-IPC rating: moderate
Record Count by County

Alameda: 15 Lake: 2 Placer: 40 Sierra: 5
Alpine: 3 Lassen: 63 Plumas: 12 Siskiyou: 31
Amador: 3 Los Angeles: 45 Riverside: 41 Solano: 32
Butte: 4 Madera: 5 Sacramento: 11 Sonoma: 3
Colusa: 4 Marin: 28 San Benito: 24 Stanislaus: 2
Contra Costa: 20 Mariposa: 1 San Bernardino: 57 Sutter: 74
El Dorado: 9 Merced: 6 San Diego: 17 Tehama: 3
Fresno: 46 Modoc: 9 San Joaquin: 10 Tulare: 34
Glenn: 11 Mono: 12 San Luis Obispo: 40 Tuolumne: 2
Imperial: 4 Monterey: 20 Santa Barbara: 33 Ventura: 94
Inyo: 19 Napa: 7 Santa Clara: 17 Yolo: 41
Kern: 50 Nevada: 35 Santa Cruz: 7 Yuba: 1
Kings: 42 Orange: 26 Shasta: 5

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 11/21/2024).