Picture of the Day

Canada Thistle

July 30, 2021   ―-  Archive

License: Creative Commons Attribution 4.0 International License.

Here are Canada thistle (Cirsium arvense) flowers in the Lefthand OHV area of Boulder County, Colorado. This plant is called a noxious weed in Colorado. Cows won't eat it, so it's not liked by farmers and ranchers, but bees love it as it produces lots of nectar. This photo was taken on July 21, 2021.

Equipment used: Canon EOS Rebel T5i with a standard zoom lens (EF-S 18-55 mm).

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Authors: Richard Hollos and Stefan Hollos