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Plant identification
 Moderated by: DrDeb  
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Aloha
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 Posted: Tue Apr 22nd, 2014 09:20 pm
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Can anyone help me identify what this plant is? I have the Poisonous Plants CD and the nearest thing I see that kind of looks like it is Poison Hemlock, but on closer comparison, they are different. The drawing of the Poison Hemlock leaves is on p. 163 of the CD. And these are photos I just took. I don't know what the flower looks like. Neither the leaves or the stalk are hairy or prickly. The horses are avoiding it.
Plant currently is about 12" high. It does not grow up from one stem and fan out, but individual stems. The stems have some reddish vertical stripes that markedly end part way up the stalk. If anyone knows what this is or can give me any guesses, I will continue investigating. I live in Western Washington State. I will also run this by the plant ladies at the nursery when I go there. Thank you!
Monica

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Last edited on Tue Apr 22nd, 2014 09:29 pm by Aloha

Aloha
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 Posted: Tue Apr 22nd, 2014 09:25 pm
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The stem.

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Aloha
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 Posted: Tue Apr 22nd, 2014 09:27 pm
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Close up of leaves.

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Pintado
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 Posted: Tue Apr 22nd, 2014 09:59 pm
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When I do a Google image search on poison hemlock, the leaf structure is quite different.

Val
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 Posted: Tue Apr 22nd, 2014 10:03 pm
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Poison hemlock's leaves grow opposite each other on the stem. Your plant's leaves grow alternately.

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Aloha
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 Posted: Tue Apr 22nd, 2014 11:10 pm
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Val, yes that is what I noticed too.

Emma
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 Posted: Wed Apr 23rd, 2014 04:35 am
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Hi Aloha,

It looks to be in the same family as Hemlock (Apiaceae)and could be Anthriscus sylvestris (Wild Chervil, Cow Parsley, Queen Anne's Lace), but best to check with your Ag department extension officer or equivalent in your area when it flowers. If it is A. sylvestris it is not poisonous, although it is introduced to the USA and considered invasive in some areas.

Regards,

Emma

Aloha
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 Posted: Wed Apr 23rd, 2014 06:02 am
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Thank you! I will look those up.

DrDeb
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 Posted: Wed Apr 23rd, 2014 08:48 pm
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Yes, sorry Aloha, I've been so busy getting ready to come down to visit Emma and my other Australian riding students that I didn't get back to your query. But believe Emma: she works for the national botanical department and is an expert. I agree it's most likely Queen Anne's Lace which is essentially benign, although Cow Parsley is also a possibility and that's more toxic. If the plant gets huge, it's probably Cow Parsley; Queen Anne's Lace will stay under 3 ft. tall. If it is Cow Parsley, wear gloves and a longsleeved shirt in pulling it up, as it contains compounds that will soak through your skin and which are carcinogenic.

If you wait 'til one of the plants puts out flowers, I.D. will be easier and more certain. -- Dr. Deb

Emma
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 Posted: Thu Apr 24th, 2014 06:22 am
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Ah, the curse of the common name! Dr Deb, the sources I have name Wild Chervil, Cow Parsley and Queen Anne's Lace (along with Wild Beaked Parsley, Hedge Parsley and Keck) all as common names for Anthriscus sylvestris. I know that Queen Anne's Lace is associated other species in the Apiaceae. Do you know the botanical name for what you are calling Cow Parsley?

When searching for information on plants it's best to use the botanical name to avoid confusion!

Looking forward to seeing you in a few weeks,

Emma.

saffire_100
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 Posted: Mon Apr 28th, 2014 11:55 pm
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Hello:

I used to live near your area and there is a good chance that this weed is common tansy. Tanecetum vulgare L. Sunflower family.

http://www.co.stevens.wa.us/weedboard/other%20weeds/HTM%20pages/cmtansy.htm

Aloha
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 Posted: Tue Apr 29th, 2014 12:56 am
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saffire, thank you. That could be the same plant at a later stage of growth.

DrDeb
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 Posted: Sun May 4th, 2014 01:07 pm
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Check Herculaneum spp. -- that's "cow parsley" as  I know it. -- Dr. Deb

Aloha
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 Posted: Sun Aug 3rd, 2014 11:04 pm
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And the gold star goes to . . . saffire_100!
I wound up spraying them to kill them off, but there is some growing along our road coming in as well as out along the logging roads where I ride. They are now beginning to bloom and "common tansy" is definitely it. The tallest one I saw was 5 feet tall! Also the weed experts had a sample at our street fair last weekend.
Thought I'd post an update for anyone who might go searching and find this helpful in the future.
Thanks again everyone for your input! Mystery solved!

Last edited on Sun Aug 3rd, 2014 11:05 pm by Aloha


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