Classification
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All Names

  • Scientific names
    • Cirsium occidentale californicum
  • English
    • California thistle

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Recent observations

Photos

Square

What

California thistle Cirsium occidentale var. californicum

Observer

robberfly

Date

May 19, 2013 04:20 PM PDT

Photos

8667161452_0cea1d708f_s

What

California thistle Cirsium occidentale var. californicum

Observer

lynnwatson

Date

Apr 19, 2013 12:24 PM PDT

Photos

8666063009_c67f317580_s

What

California thistle Cirsium occidentale var. californicum

Observer

lynnwatson

Date

Apr 19, 2013 02:24 PM PDT

Photos

Square

What

California thistle Cirsium occidentale var. californicum

Observer

jonathanwitkop

Date

Apr 8, 2013

Photos

Square

Observer

robberfly

Date

Mar 25, 2013 11:54 AM PDT

Description

Native Thistle - probably original hosts for Painted Lady ( V. cardui ) and Mylitta Crescent ( P.mylitta )

Photos

Square

Observer

microm

Date

May 3, 2012

Description

California Thistle amidst Pseudognaphalium bicolor.

Photos

Date

Apr 29, 2012 06:09 PM PDT

Description

It was a stem with only one purple flower. It had some thorns on it

Photos

What

California thistle Cirsium occidentale var. californicum

Observer

zabbey

Date

May 23, 2010
View all observations

Description from Wikipedia