another request to id unknown plants

Hi all,
Please help me id two more unknown plants/weeds? The pictures are at http://home.comcast.net/~audreylt/wsb/html/view.cgi-photos.html-.html . Thanks in advance.
Audrey
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audrey said:

#1 looks like a seedling of a tulip tree AKA 'yellow poplar' (Liriodendron tulipfera). This is a splendid tree, the tallest broadleaf trees in the eastern US. This one is not a weed but rather a good plant out of place.
#2 may be a smartweed or knotweed (Polygonum sp.), with the emphasis on WEED.
--
Pat in Plymouth MI

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I am leaning towards a bedstraw or carpetweed on #2
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