Synonyms: Rubus discolor Weihe & Nees., Rubus procerus Muller, Rubus grabowskii Weihe ex Gunther et al., Rubus praecox Bertol.
Common names: Himalayan blackberry
Rubus armeniacus (Himalayan blackberry), formerly known as Rubus discolor, is a sprawling, essentially evergreen, glandless, robust shrub (family Rosaceae). Rubus armeniacus occurs in California in the coast ranges, Central Valley, and Sierra Nevada. This weed is a strong competitor. It rapidly displaces native plant species and thickets to produce such a dense canopy that the lack of light severely limits the growth of understory plants.Cal-IPC Rating: High
Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
Weed RIC Management Notes
- Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.
Cal-IPC Newsletter Articles
- Rubus praecox: a newly recognized invasive European blackberry in California. Rejmánek, Marcel. Vol 25, Issue 2
- A new invasive raspberry?. Marovich, Rich. Vol 17, Issue 3
- Cal-IPC Student Chapter continues to grow. Schneider, Heather. Vol 17, Issue 2
- East Bay volunteers head to the hills and the shores. Schwartz, Susan. Vol 16, Issue 4
- Rubus armeniacus. Richardson, Briana. Vol 12, Issue 3
- Richmond weed abatement ordinance. . Vol 07, Issue 1
- Results of the CalEPPC questionnaire at Symposium ’98 in Ontario. DiTomaso, Joe. Vol 06, Issue 4
- Exotic pest plants of greatest ecological concern in California September 1994. Cal-IPC. Vol 02, Issue 4
- California Exotic Pest Plant Council draft list exotic plants of greatest concern October 1993. CalEPPC. Vol 01, Issue 4
Cal-IPC Symposium Presentations
- Jones, L. J. and M. Hutten (2010). Trials of aminopyralid and a cut-and-dab method for Himalayan blackberry control. Cal-IPC 2010 Symposium. Ventura, CA, California Invasive Plant Council.
- Pacini, N. (2008). Mechanical control coupled with native species planting as a cost-effective method of controlling Himalayan blackberry. California Invasive Plant Council Symposium 2008, California Invasive Plant Council.
- Rogner, M. (2008). A four-step approach to Himalayan blackberry (Rubus discolor) removal. California Invasive Plant Council Symposium 2008. Chico, CA, California Invasive Plant Council.
- Clark, L. and M. Jasieniuk (2008). Hybridization between invasive and native blackberries (Rubus) in California. California Invasive Plant Council Symposium 2008. Chico, CA, California Invasive Plant Council.
- DiTomaso, J. M. (1997). Risk analysis of various weed control methods. California Exotic Pest Plant Council Symposium '97. Concord, CA.
- Jackson, N. E. (1996). Control of exotic weeds with Roundup herbicide: A survey of projects around the world. California Exotic Pest Plant Council Symposium. San Diego, CA.
Other Rubus armeniacus Information
- CalPhotos - Images of plants taken mostly in California.
- Calflora - See the distribution of this species on Calflora's map of California.
- CalWeedMapper - Distribution information with ability to determine regional priorities.
- Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
- USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.
- Bugwood - National database from the Center for Invasive Species and Ecosystem Health at the University of Georgia.