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    • Recent Stories
  • About CNPS
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    • Publications
      • CNPS Press
      • CNPS Scientific Journal
      • Flora
      • CNPS Bulletin
    • Accountability
    • Chapters
      • Chapter Map
      • Chapter Council
    • Contact
  • Our Work
    • Biodiversity Initiatives
      • 30×30
      • Community Science
      • Horticulture Science
      • Stewardship
      • Survey of California Biodiversity
      • ReOak
    • Conservation
      • Important Plant Areas
      • Climate Change
      • Forestry
      • Desert Conservation
      • Endangered Species
      • Regional Conservation Planning
      • Wildfire and Native Plants
      • Conservation Policies
    • Education
      • Students
        • Student Research Grants 2023
        • CNPS Education Grants
        • Chapter Scholarships
        • Parents and Teachers
        • Networking & Botanical Info
        • Student Workshops
        • Student Advisory Group
      • Workshops
      • Rare Plant Treasure Hunts
      • Botanist Certification
      • 2022 Conference
    • Gardening
      • Getting Started
      • Design Basics
      • Bloom! California
      • Prepping and Planting
      • Digging Deeper
      • Garden Ambassadors
      • Gardening Webinars
    • Rare Plant Program
      • CNPS Inventory of Rare Plants
      • Rare Plant Ranking & Review
        • California Rare Plant Ranks
        • Rare Plant Status Review Forum
      • Endangered Species
      • Rare Plant Treasure Hunts
      • Local Flora – Floristics
      • Locally Rare
      • Rare Plant Photo Collection
      • Field Protocols & Guidelines
      • Rare Plant Program Committee
    • Vegetation Program
      • California Grasslands & Vernal Pools Initiative
      • California Rare Plant Communities Initiative
      • Manual of California Vegetation
      • Plant Community Mapping & Monitoring
      • Field Protocols & Guidelines
      • Classification and Mapping Reports
  • Helpful Tools
    • Calscape
    • Inventory of Rare Plants
    • Manual of CA Vegetation
  • Get Involved
    • Membership
    • Events Near You
    • Chapters
    • Priority Initiatives
      • Dudleya Protection
    • Volunteer to help CNPS
  • Join / Renew
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  • Siskiyou iris (Iris bracteata)
    Rare Plants

    “List 3” Plants on the Rare Plant Inventory

    June 16, 2022
    Learn about the plants united by one common theme–we lack the necessary information to assign them to one of the other ranks or to reject them.
  • Rare Plants

    Using the Rare Plant Inventory Advanced Search

    May 12, 2022May 12, 2022
    Using the RPI's advanced search allows you to unlock even more capabilities! List/Rank, Location, Biology, and more.
  • Rare Plants

    How to Search the Rare Plant Inventory

    April 28, 2022April 28, 2022
    Over one-third of California’s flora is considered rare. Learn expert tips to search the RPI to prepare a list of rare plant species for a project.
  • Eriogonum nervulosum
    Rare Plants

    The Many Uses of the CNPS Rare Plant Inventory

    April 14, 2022April 27, 2022
    It sounds mysterious and magical, like an ancient tome you would check out of the library. Where does it come from?

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