What's this weed?

 I'm fumbling around looking for it online, but I'll bet someone's seen
it before:

http://i868.photobucket.com/albums/ab249/these_trees/P1170043.jpg

It's got a fuzzy stem and red taproot, growing in full exposure in
cool, damp, mostly cloudy conditions thus far.  When they were tiny I
thought they might be part of the (welcome) radish march across the
garden, but not so.

No real concern -- just wondering if this is anything useful or
interesting before I clear them away (really, before the zucchini
shade them out of existence).

Just outside Boston, for reference.  But you probably figured that out
already.

 Pete from Boston said:

Redroot pigweed (Amaranthus retroflexus)

http://www.ppws.vt.edu/scott/weed_id/amare.htm

--
Pat in Plymouth MI
    
"So, it was all a dream."
"No dear, this is the dream, you're still in the cell."  
 
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Thanks.  That's actually the closest I came myself, but the pictures I
saw weren't quite as spot-on as that one.