Unable to identify this Saskatchewan weed

envirojackJuly 3, 2014

I have been trying to ID this weed for the last few days to no avail. It almost has a "dog fennel" look to it, but is way outside the range of that plant. So far the closest looking plants I have found to it are in the Artemisia or possibly Ambrosia family. The plant was found on a disturbed site in south eastern Saskatchewan. Any help would be greatly appreciated.

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envirojack

I am putting it into my report as Ambrosia artemisiifolia, even though I haven't seen ragweed with such a reddish stalk before. Still curious to hear other people's thoughts.

    Bookmark   July 3, 2014 at 4:29PM
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missingtheobvious(Blue Ridge 7a)

Do the leaves have the typical whitish/silver undersides?

    Bookmark   July 3, 2014 at 9:15PM
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envirojack

@missingtheobvious No the leaf color is relatively uniform. You can see the backs of some of the leaves at the top of the plant and they are green on the underside.

    Bookmark   July 4, 2014 at 11:58AM
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missingtheobvious(Blue Ridge 7a)

The leaves aren't at all like the Ambrosia artemisiifolia I'm familiar with: not only the reddish color, but also much too finely cut. I believe I've read that most if not all in those genuses/genera are known for leaves with undersides which are whitish or "silver."

If you don't have a similar source for Canada, this at least shows southern Canada: you can look under Asteraceae, then click on Ambrosia and Artemisia to see which types live where, then search for photos on the Internet. [Near the top of the linked page is a link to the "Map Color Key".]
http://bonap.net/NAPA/Family/Traditional/County

    Bookmark   July 4, 2014 at 11:28PM
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envirojack

Thank you for that website. What an awesome tool. You are right that it's not Ambrosia artemisiifolia. I am thinking Artemisia biennis now.

    Bookmark   July 7, 2014 at 12:06PM
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missingtheobvious(Blue Ridge 7a)

Glad to be of help!

    Bookmark   July 7, 2014 at 3:25PM
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pitimpinai(z6 Chicago)
    Bookmark   July 7, 2014 at 3:46PM
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pitimpinai(z6 Chicago)

I think it's a Tamarix.

    Bookmark   July 7, 2014 at 3:48PM
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floral_uk z.8/9 SW UK

Not Tamarix.

    Bookmark   July 7, 2014 at 4:32PM
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