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Water Hemlock? S.E. Michigan, USA

Posted by MarcPerr 5 (My Page) on
Fri, Aug 22, 14 at 6:06

This is by the creek. Its leaves do not look like poison hemlock to me, and certainly not Sambucus. Is it water hemlock?


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RE: Water Hemlock? S.E. Michigan, USA

Photo 2


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RE: Water Hemlock? S.E. Michigan, USA

Photo 3


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RE: Water Hemlock? S.E. Michigan, USA

  • Posted by dbarron Z6/7 (Oklahoma) (My Page) on
    Fri, Aug 22, 14 at 6:34

I couldn't be sure which one of the possibilities of species, but it sure looks like one of the water hemlocks.


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RE: Water Hemlock? S.E. Michigan, USA

That is the spotted water hemlock, Cicuta maculata.


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RE: Water Hemlock? S.E. Michigan, USA

Researching Cicuta maculata on the web has led to a lot of confusion. One site suggests that it is a synonym for Cicuta douglasii, but that seems to be incorrect information.
http://science.halleyhosting.com/nature/gorge/5petal/pars/cicuta/waterhem.htm

How to tell the difference between the two? I've also found hemlock with parsley-like leaves referred to as spotted water hemlock. And that leads to another question: Why is it called "spotted"?


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RE: Water Hemlock? S.E. Michigan, USA

With few exceptions, most of what has been identified as C. douglasii is not genetically distinct from C. maculata. If you are interested in the work done on this

http://www.life.illinois.edu/downie/Cicuta.pdf

It is called spotted water hemlock (maculata means spotted) because the stems sometimes have purple spots. The introduced poison hemlock (Conium maculatum) also has purple spotted stems and more finely divided leaves. There is a plant called hemlock parsley (Conioselinum chinense) that grows in fens that is superficially similiar. The bulblet-bearing water hemlock (Cicuta bulbifera) is a much more delicate plant compared to the rest of these.


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RE: Water Hemlock? S.E. Michigan, USA

lycopus, that is great information and very much appreciated. Thank you!


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RE: Water Hemlock? S.E. Michigan, USA

I guess someone should mention that any part of water hemlock can kill you dead. It's especially toxic to grazing livestock and may be the most poisonous plant in the U.S. It ranges south into Florida but not as far south as where I live in Homestead.


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