Photos / Sounds

Square

What

cobwebby thistle Cirsium occidentale

Observer

dgreenberger

Date

April 16, 2014 07:27 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

Observer

c_michael_hogan

Date

April 3, 2014

Description

Seen in bloom near a fire road in a sunny clearing within the wider mixed oak woodland. This specimen is about seventy cm high.

Photos / Sounds

What

California thistle Cirsium occidentale var. californicum

Observer

jwarnert

Date

March 29, 2014 10:18 AM PDT

Photos / Sounds

Square

Observer

steers

Date

March 29, 2014 09:43 AM PDT

Photos / Sounds

What

cobwebby thistle Cirsium occidentale

Observer

lechnaumovich

Date

March 29, 2014 08:41 AM PDT

Photos / Sounds

No photos or sounds

Observer

ewrubel

Date

March 28, 2014

Photos / Sounds

Square

What

cobwebby thistle Cirsium occidentale

Observer

mrchasse

Date

March 28, 2014 05:57 PM PDT

Photos / Sounds

Square

What

Cirsium occidentale var. Occidentale Cirsium occidentale var. occidentale

Observer

esppim

Date

March 25, 2014 10:12 AM PDT

Photos / Sounds

No photos or sounds

What

Cirsium occidentale var. Occidentale Cirsium occidentale var. occidentale

Observer

esppim

Date

March 25, 2014 10:09 AM PDT

Photos / Sounds

Square

Observer

daledanley

Date

March 28, 2014 12:47 PM PDT

Description

Backyard specimen. No flower spike yet.

Photos / Sounds

Square

What

venus thistle Cirsium occidentale var. venustum

Observer

bernhardwar

Date

March 27, 2014 12:33 PM PDT

Photos / Sounds

Square

Observer

c_michael_hogan

Date

March 17, 2014

Description

The rosette of this new thistle has formed in the past week or so.

Tags

Photos / Sounds

Observer

c_michael_hogan

Date

February 16, 2014

Description

This dried Cirsium agrees with the diagnostics of C. occidentale. It is erect and single stemmed with a height of about seventy cm. The leaves and stem are spiny and the ten cm leaf is spiny, clasping and dentate. Dried flower heads are about twenty two mm. This is a native thistle here. The microhabitat is in a sunny dry ridge with rocky soil., within a small clearing of generally chaparral habitat.

Tags

Photos / Sounds

Square

What

cobwebby thistle Cirsium occidentale

Observer

mrchasse

Date

February 13, 2014 02:44 PM PST

Photos / Sounds

Square

Observer

charlie

Date

April 19, 2003

Description

Bottom left

Photos / Sounds

No photos or sounds

What

cobwebby thistle Cirsium occidentale

Observer

stevepiercy

Date

February 1, 1995 12:00 PM PST

Description

O'Neill Ranch Master Plan Draft Environmental Impact Report, February 1995

Photos / Sounds

What

venus thistle (Variety Cirsium occidentale venustum) Cirsium occidentale var. venustum

Observer

pherniman

Date

July 30, 2013 01:22 PM PDT

Description

Found on a hilltop in an oak woodland.

Photos / Sounds

Square

What

California thistle Cirsium occidentale var. californicum

Observer

snakeinmypocket

Date

August 19, 2009 10:27 AM PDT

Photos / Sounds

Square

What

cobwebby thistle (Cirsium occidentale) Cirsium occidentale

Observer

ben_hoffman

Date

July 17, 2013

Description

Found aside trail on our way to Grouse Hill. Was growing up next to the underbrush, where lots of sticks and dead down twigs were laying around and caught in the bushes.

Photos / Sounds

Square

What

cobwebby thistle (Cirsium occidentale) Cirsium occidentale

Observer

nicktrow

Date

July 8, 2013 03:05 PM PDT

Photos / Sounds

Square

What

California thistle Cirsium occidentale var. californicum

Observer

kaitlin

Date

June 26, 2013 07:16 PM PDT

Photos / Sounds

What

Cobwebby Thistle Cirsium occidentale

Observer

lynnwatson

Date

June 22, 2013 08:47 AM PDT

Photos / Sounds

Square

What

venus thistle Cirsium occidentale var. venustum

Observer

icosahedron

Date

June 23, 2013 11:00 AM PDT

Photos / Sounds

Square

What

Cobwebby Thistle Cirsium occidentale

Observer

careylang

Date

June 20, 2013 11:48 AM PDT

Photos / Sounds

Square

What

cobwebby thistle (Cirsium occidentale) Cirsium occidentale

Observer

mixmastermontez

Date

June 11, 2013

Place

tujunga (Google, OSM)

Photos / Sounds

9059654082_a5ba3f5108_s

What

Cobwebby Thistle Cirsium occidentale

Observer

james3

Date

June 15, 2013

Photos / Sounds

What

cobwebby thistle (Cirsium occidentale) Cirsium occidentale

Observer

taj

Date

June 9, 2013

Photos / Sounds

What

cobwebby thistle Cirsium occidentale

Observer

bbunny

Date

April 14, 2013 12:04 PM PDT

Photos / Sounds

Square

What

cobwebby thistle Cirsium occidentale

Observer

jecervan

Date

June 13, 2013 02:32 PM PDT