Identify this weed ?

Could anyone identify this for me its popping up everywhere under my stone bedding there's loads of them ?
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staceyb_2003


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Some species of horsetail
http://davesgarden.com/guides/pf/b/Equisetaceae/none/none/cultivar/0 /
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On 4月29日, 午後7:20, staceyb_2003

It's a Equisetum arvense or Horsetail and is edible.
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wrote:

It's a Equisetum arvense or Horsetail and is edible.
Caution: TWikipedia<<The buds are eaten as a vegetable in Japan and Korea in spring time. All other Equisetum species are toxic. In polluted conditions, it may synthesise nicotine. There is a pic on wiki and it doesn't look like what you showed.
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and it is both ancient and has 216 chromosomes, the highest I think found to date.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Somewhere between zone 5 and 6 tucked along the shore of Lake Michigan on the council grounds of the Fox, Mascouten, Potawatomi, and Winnebago
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snipped-for-privacy@wi.rr.com writes

Fide Wikipedia, the Adder's Tounge Fern has approximately 1,400 chromosomes (it's hard to count them when there's that many).
Tilia nobilis has 328 (abstract to C.D. Piggott, A Review of Chromosome Numbers in the Genus Tilia (Tiliaceae), Edinburgh Journal of Botany 59: 239-246 (2002))
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Turns out that Wikipedia is inconsistent. Another page says 1,200 or 1,260 for Ophioglossum reticulatum - a particular species of Adder's Tongue Fern.

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When the leaf blade is present, there is not always a spore stalk present, and the plants do not always send up a leaf, sometimes going for a year to a period of years living only under the soil,
nourished by association with soil fungi. http://en.wikipedia.org/wiki/Ophioglossum
The soil fungi apparently arn't Ayn Rander, neo-liberal, free-market types;O)
Fun aside, it is really very fascinating.
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