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need ID of burrs in a criminal investigation

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fozbot3 blog photos
Joined: 1/18/2005
Location: Michigan
Posts: 7893
Posted: Aug/11/2007 9:40 AM PST

we got this message on a Michigan gardener's forum this morning and it sounded important so i'm putting up these pics on several forums in hopes of a quick ID:

~The attached photos are of "Burrs" that link a suspect to a Home Invasion in Southwest Michigan.
The dried plant material was clipped from a field next to the crime scene on July 3rd.
The scale used in the photographs is in millimeters.
The "burrs" are about 2mm in diameter and have a "chestnut burr" or "sea urchin" like appearance.
I have searched through the Aster and Biden famlies without any success.~


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yardgranny6 blog photos
Joined: 7/05/2007
Location:
Posts: 4557
Moderator
Posted: Aug/11/2007 10:32 AM PST

These look like common 'cockleburr' to me. Look up kentiff2's profile and his photo #1 is of a cockleburr.

Amazing to me how many times I look up a plants and it refers me to GG! Good going guys.

http://drought.unl.edu/gallery/2004/Oklahoma/rubbl e1.htm
fozbot3 blog photos
Joined: 1/18/2005
Location: Michigan
Posts: 7893
Posted: Aug/11/2007 11:04 AM PST

Yardgranny, the 1st photo is cocklebur. it looks too elongated to me. i was thinking Medicago minima aka prickly black medick(2nd photo). your thoughts?

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yardgranny6 blog photos
Joined: 7/05/2007
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Posts: 4557
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Posted: Aug/11/2007 5:48 PM PST

Quote:
Originally posted by fozbot3
Yardgranny, the 1st photo is cocklebur. it looks too elongated to me. i was thinking Medicago minima aka prickly black medick(2nd photo). your thoughts?


The problem there as I can find is that the prickly black medick is found in the OK and TX area. Not in Michigan. It does come close though.
fozbot3 blog photos
Joined: 1/18/2005
Location: Michigan
Posts: 7893
Posted: Aug/12/2007 8:02 AM PST

you're right, yardgranny. i did another search using just the Latin name and found 'little bur-clover' which does grow in Michigan. apparently there's several varieties of medicago minima.
yardgranny6 blog photos
Joined: 7/05/2007
Location:
Posts: 4557
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Posted: Aug/12/2007 1:19 PM PST

Wonder if they will crack the case now?? Looks like they could have looked all this up on their own. LB
fozbot3 blog photos
Joined: 1/18/2005
Location: Michigan
Posts: 7893
Posted: Aug/16/2007 10:22 AM PST

have heard nothing back from this fella regarding the case, Yardgranny. i'd love to know if we helped in any way. this member posted that they did look up several plants among them asters.
poeticpeony blog photos
Joined: 4/04/2006
Location: NE Ohio, deck chuckin' fool
Posts: 9437
Moderator
Posted: Aug/16/2007 12:30 PM PST

My dogs used to come home with those in their coats all the time. And my horse used to get into them in the pasture sometimes. They're a pain in the neck and grow all over around here. They even stick to skin. We always just called them burrs.

Probably looking in a wild plants website for the particular state would be the best bet or they could contact the co-op extension or natural resources.
yardgranny6 blog photos
Joined: 7/05/2007
Location:
Posts: 4557
Moderator
Posted: Aug/16/2007 1:07 PM PST

Back to you fozbot. We are out of options. LB
fozbot3 blog photos
Joined: 1/18/2005
Location: Michigan
Posts: 7893
Posted: Sep/07/2007 6:26 PM PST

never heard another thing from this guy. hope they got their man/woman.
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