Eastern Mojave Vegetation Coll. No. 2773, Cirsium arvense  
 

 

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If you have a question or a comment about this photograph you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address. 		  Asteraceae, Cirsium arvense
Scanned 4 June 2022.

Native and Naturalized Flora of the Golden Area, Jefferson County, Colorado
Asteraceae

Cirsium arvense (L.) Scop.  Canada Thistle.

Delong Park, Jefferson County, Colorado. New city park (construction in 2021 and 2022) near the intersection of 23rd Street and Vernon Drive, 1.75 km. southeast of the GNIS location of Golden. Basal leaves, shallowly dentate, spinulose; petiole narrowly winged, bases tapered. Colorado Noxious Weed List B.

Collected by permit: City of Golden, 2022, issued: Mar 17, 2022, to: Tom Schweich.

Tom Schweich, with Carol Cameron & David Chavez 2773. 6-May-2022

Article records that use this photograph:

Other photos about Species - Asteraceae or Cirsium arvense.

 

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Date and time this page was prepared: 11/8/2025 1:43:16 PM