Source: California Invasive Plant Council

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Invasive Plant Inventory - 2017 Update Complete

Cal-IPC has completed a periodic update of its California Invasive Plant Inventory. All stakeholders were encouraged to comment on the process. The initial 60-day public comment period was March 8 through May 8. A document with the full text of all comments received is linked below, as is a document with responses from the Technical Advisory Team. No changes to plant categorization were made, so we will not hold a second 30-day public comment period.

Ten plant species were added to our Inventory as plants currently causing harm in California, as assessed using the Plant Assessment Form (PAF) protocol. In addition, 86 plant species (out of 200 species evaluated) have been confirmed as "watch" species by virtue of evaluation using the predictive assessment protocol developed by UC Davis and the University of Washington.

View comments received (includes referral to applicable response in the response document)

View responses to comments

View species added as invasive

View species added as "watch" plants

Cal-IPC revisits the Inventory on a periodic basis. If you have new information from the field on plants that are on the Inventory or plants that you think should be evaluated, contact Cal-IPC Science Program Manager Ramona Robison.

Project Team

Project Leads:

  • Dr. Ramona Robison, Science Program Manager, Cal-IPC
  • Dr. Elizabeth Brusati, Sr. Environmental Scientist, California Dept. of Fish & Wildlife (formerly Senior Scientist, Cal-IPC)
  • Doug Johnson, Executive Director, Cal-IPC

Technical Advisors:

  • Giselle Block, Biologist, US Fish & Wildlife Service
  • Dr. Jutta Burger, Science & Stewardship Director, Irvine Ranch Conservancy
  • Barbara Castro, Environmental Scientist, California Department of Water Resources
  • Gina Darin, Senior Environmental Scientist, California Department of Water Resources
  • Dr. Holly Forbes, Curator, University of California Botanical Garden at Berkeley
  • Dr. Naomi Fraga, Director of Conservation Programs, Rancho Santa Ana Botanic Garden
  • Tim Hyland, Resource Ecologist, California State Parks, Santa Cruz District
  • Dr. Irina Irvine, Restoration Ecologist, Santa Monica Mountains Natural Recreation Area
  • Dr. Denise Knapp, Director of Conservation and Research, Santa Barbara Botanic Garden
  • John Knapp, California Islands Ecologist, The Nature Conservancy
  • Dr. Chris McDonald, Natural Resources Advisor, University of California Cooperative Extension
  • Dr. Lynn Sweet, Plant Ecologist, U.C. Riverside Center for Conservation Biology
  • Ron Vanderhoff, General Manager and Vice President, Roger's Gardens
  • Dr. Kristina Wolf, U.C. Davis, Agricultural Sustainability Institute
  • Eric Wrubel, Botanist, National Park Service, San Francisco Bay Area Network

Additional Technical Consultants:

  • Dr. Joseph DiTomaso, Department Chair, U.C. Davis, Department of Plant Sciences
  • Dr. Dean Kelch, Primary Botanist, California Department of Food and Agriculture

Partial funding for this project comes from the USDA Forest Service, State and Private Forestry. In accordance with Federal law and U.S. Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin, sex, age or disability. (Not all prohibited bases apply to all programs.) To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington DC 20250-9410 or call (202) 720-5964 (voice and TDD). USDA is an equal opportunity provider and employer.