Source: California Invasive Plant Council
URL of this page: http://www.cal-ipc.org/ip/management/alerts/index.php
Watchlist and Invasive Plant Alerts
Victorian box tree (Pittosporum undulatum) invades several areas along the central California coast.
Cal-IPC's Watchlist compiles information on plants not yet on our statewide Invasive Plant Inventory that land managers have reported escaping in wildlands. Some of these plants were previously evaluated for our statewide Invasive Plant Inventory but were not added to the Inventory due to lack of information or limited distribution within California. More information will allow us to re-consider these species. For each species, the Watchlist includes where and in what habitat types it has been reported, and where else in the world it is invasive. This watchlist will be updated as we receive new information.
Please send reports of new species, along with information on the impacts they appear to have and photos if possible, to Elizabeth Brusati, firstname.lastname@example.org. We also encourage entering locations on Calflora. Not only does this provide an initial time frame for the invasion, but also alerts land managers in other regions of the state to the potential threat. Rapid action on a new invader can potentially save millions of dollars with preventative control or even eradication.
"Red Alerts" from the Cal-IPC Symposium
Our annual Symposium includes information on new invasive plants and range expansions. The presentations below (pdfs) contain photographs and details on these species, also listed in our watchlist. Species already included on Cal-IPC's Inventory also have Plant Profiles.
The "Red Alerts" differ from the Alert designation within the Invasive Plant Inventory, which refers to plants with High or Moderate ratings that have the potential to increase their ranges in California.
Other Resources from Cal-IPC
Brachypodium sylvaticum (slender false-brome) - Report sightings of this plant that is spreading in redwood groves of the Santa Cruz Mountains.
The Cal-IPC News occasionally features articles about new invasive plants of concern.
- Hybrid raspberry (Rubus sp.) - Fall 2009
- Japanese dodder (Cuscuta japonica) - Summer 2006
- Knotweeds (Polygonum spp.) - Spring 2005
- Weeds in northern California - Spring 2004
- Slender false-brome (Brachypodium sylvaticum) - Winter 2003/04
- Red sesbania (Sesbania punicea) - Summer 2003
- 2001 Weed Alerts - Fall/Winter 2001
- Invasive mustard - Fall 1997