Classification
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All Names

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

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Recent observations

Photos / Sounds

Square

What

California thistle Cirsium occidentale var. californicum

Observer

jni013

Date

September 10, 2014

Description

Purple flowers (thistles) growing out of green plant, green thistles also grew out, dry soil
Warm weather, little cloud coverage

Photos / Sounds

Square

What

California thistle Cirsium occidentale var. californicum

Observer

bengross

Date

May 8, 2014 02:26 PM PDT

Photos / Sounds

No photos or sounds

Observer

les4toads

Date

April 9, 2014

Description

Venus Thistles located on Old Tunnel Road in Grass Valley, CA. First observed in spring of 2012. Two site locations along the road. Site one is on road cut embankment. Soil is sand loam with pine needle litter. Site faces WSW. 25 plants were noted at various stages of growth. Site two is along road but on more level ground. Soil is sandy loam with pine needle litter. Site faces west. One plant at this locality is approx. 36 inches tall. Three other plants are in early germination state. Will add photos from previous observations and current observations.

Photos / Sounds

What

California thistle Cirsium occidentale var. californicum

Observer

jwarnert

Date

March 29, 2014 10:18 AM PDT

Photos / Sounds

What

California thistle Cirsium occidentale var. californicum

Observer

snakeinmypocket

Date

August 19, 2009 10:27 AM PDT

Photos / Sounds

Square

What

California thistle Cirsium occidentale var. californicum

Observer

kaitlin

Date

June 26, 2013 07:16 PM PDT

Photos / Sounds

What

California thistle (Variety Cirsium occidentale californicum) Cirsium occidentale var. californicum

Observer

finatic

Date

June 11, 2013 11:11 AM PDT

Description

San Diego County, California, US

Photos / Sounds

What

California thistle Cirsium occidentale var. californicum

Observer

microm

Date

May 22, 2013

Photos / Sounds

Square

What

California thistle Cirsium occidentale var. californicum

Observer

robberfly

Date

May 19, 2013 04:20 PM PDT

Photos / Sounds

What

California thistle Cirsium occidentale var. californicum

Observer

lynnwatson

Date

April 19, 2013 12:24 PM PDT

Photos / Sounds

8666063009_c67f317580_s

What

California Thistle Cirsium occidentale var. californicum

Observer

lynnwatson

Date

April 19, 2013 02:24 PM PDT

Photos / Sounds

What

California thistle Cirsium occidentale var. californicum

Observer

jonathanwitkop

Date

April 8, 2013
View all observations

Description from Wikipedia