• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

CNPS East Bay

  • Get Involved
    • Volunteer
    • Members Meetings
    • Field Trips
    • Donate
    • Membership in CNPS
    • Restoration Projects
    • Stay Connected
  • Gardening
  • Conservation & Science
    • Conservation Committee
    • East Bay Rare Plants
    • Plants of the East Bay
    • Database of Rare and Unusual Plants
    • Research Grants Program
  • Publications
    • Bay Leaf Archives
    • News Archive
    • Guidebook to Botanical Priority Protection Areas
    • Annotated checklist of the East Bay Flora
    • Resources
  • About Us
    • Contact Us
    • Mission Statement
    • Officers & Committees
    • Press

December 30, 2020

Cirsium occidentale var. californicum

California Thistle

California thistle (Cirsium occidentale var. californicum), is ranked A2 in Alameda and Contra Costa counties. Photo by Dianne Lake.

More Information

  • Improving the Way We Assess Rarity in the Unusual Plants Project

    Primary Sidebar

    East Bay Native Plant Species

    Family: Asteraceae

    Botany & Horticulture

    • Jepson eFlora
    • Calflora
    • Calscape
    • Wikipedia

    Photos

    • CalPhotos
    • Google Images

    Subscribe to our newsletter

    Upcoming Events:

    No events are currently scheduled. Check back here, or join our Meetup group to find out when events are scheduled.

    Join CNPS

    Footer

    • FacebookFacebook
    • InstagramInstagram
    • MeetupMeetup
    • YouTubeYouTube

    Copyright © 2023 California Native Plant Society, East Bay Chapter — CNPS Privacy Policy