Rare Plant Program Summary

The mission of the CNPS Rare Plant Program (The Program) is to develop current, accurate information on the distribution, ecology, and conservation status of California's rare and endangered plants, and to use this information to promote science-based plant conservation in California.

The Program, since its inception in 1968, has developed a reputation for scientific accuracy and integrity. The Program’s data are widely accepted as the standard for information on the rarity and endangerment status of the California flora. For this reason, The Program’s primary responsibility is the maintenance of the CNPS Inventory of Rare and Endangered Plants of California (the CNPS Inventory), which tracks the conservation status of hundreds of plant species. Please click on a link below for more specific information about various aspects of the Rare Plant Program.

• The Rare Plant Program Review Process
• The Relationship between CNPS and DFG
• Volunteers
• Program Staff

The Rare Plant Program Review Process

Once a species has been identified as being of potential conservation concern, a rigorous review process ensues. The Rare Plant Botanist at CNPS evaluates existing literature, reviews herbarium collections, and communicates with experts on the species in order to gather as much information as possible on the particular species under review. Based on this information, a recommendation is then made as to whether a species merits listing by CNPS and if so, what list it should be placed on. A summary of the information gathered on the species is then put together and sent out to a statewide network of over 500 California botanists, representing state and federal agencies, consulting firms, academic institutions, CNPS and other conservation organizations. Once consensus is reached about a change amongst various members of the review groups, the species will be added to a group of pending changes, which will all be implemented and disseminated on a quarterly basis. If consensus is not reached, then a meeting will be held in order to discuss the data more fully and come to an agreement on what the best action would be to take.

Once a species has gone through the above review process, information on all aspects of the species (listing status, habitat, distribution, threats, etc.) are entered into the online CNPS Inventory. The print and online versions of the CNPS Inventory are used by thousands of professional and amateur botanists throughout the state. Consultants and planners preparing environmental documents use the CNPS Inventory to determine the potential for resource conflicts and the scope of necessary botanical surveys. Resource managers use the information to guide rare plant protection and the acquisition and management of preserve areas. Conservationists use the same data to review environmental documents and prepare testimony to educate decision-makers. Researchers use the information to evaluate trends and changes in populations of rare plants.

The Program currently recognizes more than 1400 plant taxa (species, subspecies and varieties) as rare or endangered in California (CNPS Lists 1B and 2). This constitutes approximately 25% of California’s native flora. More than 500 additional species are on the CNPS’ list of plants of limited distribution (List 4, a “watch” list) and approximately 55 additional species are on the CNPS’ list of taxa about which we need more information (List 3). The Program also contains information on approximately 25 native plants that are presumed to have gone extinct in California in the last 100 years (primarily because of land conversion to agriculture and urban development).

The Relationship between CNPS and the California Department of Fish and Game

The Program operates under a Memorandum of Understanding (MOU) with the California Department of Fish and Game (DFG). The MOU outlines broad cooperation in rare plant assessment and protection, and formalizes cooperative ventures such as data sharing and production of complementary information sources for rare plants. To facilitate this cooperation, the Rare Plant Botanist is housed at the Sacramento office of the DFG’s Biogeographic Data Branch. CNPS and the DFG Natural Diversity Data Base (CNDDB) share all data files and rare plant information and work together on a daily basis to provide current, accurate information on the distribution, endangerment status, and ecology of California's rare flora.

Once a species has undergone the CNPS Review Process and has been added to a CNPS List, CNDDB uses the information gathered to map the rarest plant species to their precise locations. CNDDB makes this information available through RareFind or custom Geographic Information Systems (GIS) maps and digital information. While CNPS updates data more continuously, location information is reported more precisely by CNDDB.

Volunteers

The Program relies heavily on volunteer participation. Over 500 volunteer collaborators contribute rare plant data and review proposed changes to the CNPS Inventory. They provide a consensus view of the rarity, endangerment status, and ecology of California's rare plants. In addition, The Program receives support from volunteer Rare Plant Coordinators from each of the 33 CNPS chapters, and from many other professional and amateur botanists. The Program staff regularly provide technical assistance and rare plant information to CNPS chapters, conservation staff and volunteers for their advocacy work.

Chapter Rare Plant Coordinators serve as the Society’s local advocates for rare plant protection and conservation planning throughout California. They also conduct surveys of rare plant populations in their area. They, and other chapter members, contribute over half of the new field-based information reviewed by The Program. Rare Plant Coordinators and Conservation Chairs review development projects, participate in local planning processes, and distribute information to agency biologists and consultants. Program staff support the Rare Plant Coordinators by distributing rare plant information, proposing focused surveys for particular plant species, and maintaining the CNPS Inventory. The Program has also developed the CNPS Mitigation Guidelines Regarding Impacts to Rare, Threatened, and Endangered Vascular Plants -- a document prepared to aid CNPS Chapters in their review of local developments and conservation plans.
 
One of the biggest contributions from a CNPS volunteer was the development of the online CNPS Inventory. Larry Levine, from the North Coast Chapter of CNPS, developed the online CNPS Inventory in 2001 and much time has been spent by Larry and the CNPS Rare Plant Botanist in maintaining and updating this database. The online version of the CNPS Inventory is updated quarterly and includes many useful features such as search tools, photos and maps.

Program Staff and Leadership

The Program currently has one full-time staff member: Rare Plant Botanist Nicholas Jensen (njensencnps.org, 916/324-3816). Nicholas is responsible for implementing the CNPS Review Process as well as maintenance of the CNPS Inventory and dissemination of data. He also assists with state and federal listing and other rare plant conservation work as time allows.