Carduus pycnocephalus from California-GS09022020-2

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Gurcharan Singh

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Feb 9, 2020, 9:19:55 AM2/9/20
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Carduus pycnocephalus L. Asteraceae
Common Name: Italian plumeless thistle, Plymouth thistle
Annual herb with stem winged with spines, leaves tomentose underside, lobes spine-tipped, heads in clusters of 2-5, cobwebby hairs at base, involucre bracts spine-tipped.
Clicked from Fremont California, April, 2019.




Dr. Gurcharan Singh
Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Mob: 9810359089
Carduus pycnosephalus-Paseo Padre Rd Fremont-IMG_3140.jpg
Carduus pycnosephalus-Paseo Padre Rd Fremont-IMG_4872.jpg

Gurcharan Singh

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Aug 15, 2025, 10:03:25 AM8/15/25
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More clicked in 2023
Carduus pycnocephalus Mount Hermon Santa Clara-IMG_2185.jpg

Gurcharan Singh

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Aug 15, 2025, 10:04:45 AM8/15/25
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one more in 2023
Carduus pycnocephalus Mount Hermon Santa Clara-IMG_2188.jpg

Saroj Kasaju

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Aug 15, 2025, 11:58:06 AM8/15/25
to indian...@googlegroups.com, Gurcharan Singh, J.M. Garg
Does it look more like Carduus tenuiflorus Curtis ??

Thank you.

Saroj Kasaju


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Gurcharan Singh

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Aug 19, 2025, 1:54:35 AM8/19/25
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Heads very congested in C. tenuiflorus
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