Classification
Within iNaturalist.org

All Names

  • English
    • Slender Winged Thistle
    • Italian thistle
    • Plymouth Thistle
  • Scientific Names
    • Carduus pycnocephalus

Guide Colors

 

Extras

Taxonomic changes »

Taxon schemes »

Make taxonomic Flickr tags for this taxon »

Flickr invite link »

Wikipedia taxobox »

Tree Browser »

Search descendant taxa »

Embed a widget for this taxon on your website »

Recent observations

Photos / Sounds

15846645976_5f59833efc_s

What

Italian thistle Carduus pycnocephalus

Observer

jaykeller

Date

November 24, 2014 03:01 PM PST

Photos / Sounds

What

Slender Winged Thistle Carduus pycnocephalus

Observer

m_jon

Date

September 21, 2014 02:06 PM NZST

Photos / Sounds

Observer

bbi2

Date

October 31, 2013 04:58 PM NZDT

Description

Thistles paradise
Not really much winged though
Whitish colour by salt spray

Photos / Sounds

What

italian thistle Carduus pycnocephalus ssp. pycnocephalus

Observer

dshell

Date

September 26, 2014 04:41 PM PDT

Photos / Sounds

14847913614_0fb736fb61_s

What

Italian thistle Carduus pycnocephalus

Observer

greenrosettas

Date

August 2, 2014

Photos / Sounds

Square

What

Italian thistle Carduus pycnocephalus

Observer

mytilludie

Date

July 27, 2014 12:52 PM PDT

Photos / Sounds

What

Italian thistle Carduus pycnocephalus

Observer

mytilludie

Date

June 25, 2014

Photos / Sounds

Square

What

Italian thistle Carduus pycnocephalus

Observer

phildkim

Date

May 20, 2014 06:22 PM PDT

Place

brand park (Google, OSM)

Description

Carduus pycnocephalus “Italian thistle” is a European annual weed of disturbed sites. While most thistles have inforescence heads borne singly, in this species several are clustered at the stem tip. Although present for many decades in Northern Cailfornia, it is a recent invader into the watershed, first reported in 1967.

Photos / Sounds

Square

What

Italian thistle Carduus pycnocephalus

Observer

kueda

Date

June 16, 2014 01:37 PM PDT

Photos / Sounds

14169344957_d0421ea9f0_s

What

Italian thistle Carduus pycnocephalus

Observer

jaykeller

Date

June 3, 2014 12:11 PM PDT

Photos / Sounds

Square

What

Italian thistle Carduus pycnocephalus

Date

June 1, 2014 10:32 AM PDT

Photos / Sounds

Square

What

Italian thistle Carduus pycnocephalus

Observer

rstapornkul

Date

May 27, 2014 07:46 AM PDT

Description

Common name: Italian thistle
Scientific Name: Carduus pycnocephalus
Time of Observation: 7:46:27
Date: 2014-05-27
Weather: Sunny, no wind
Temperature: 18 C
Location: Eaton Canyon Park, Pasadena, CA, US

Habitat: Alluvial savannah
Slope: flat terrain/depression surrounded by slight slope
Sun: complete exposure to sunlight
Water: no surrounding water seen
Soil: alluvial- sandy, gravelly soils

NOTES:
The Italian thistle was found off the main walking trail in a dry, desert-like, and alluvial area filled with stones. The invasive species often found in disturbed areas in soils with relatively high pH is spiny towards the tips. No flowers were seen on the plant during this summer season.

View all observations

Description from Wikipedia

Carduus pycnocephalus, with common names including Italian thistle, Italian plumeless thistle, and Plymouth thistle, is a species of thistle. It is native to: the Mediterranean region in southern Europe, North Africa, and Western Asia; East Europe and the Caucasus; and the Indian Subcontinent.

No range data available.