This week in southern Minnesota I saw most of the forager bees 
coming  in with a white streak of pollen or plant material from their 
head all the way down their backs. 

The mark was so noticeable I thought of Tom Seeley and how he 
marks his bees in his experiments. 

 The pollen they were bringing in was light tan in color, small loads 
and very sticky.  I saw this going on in 3 different yards so the plant 
must be fairly common.

I'm trying to figure out what plant they could have been visiting that 
would have a long tube like shape. Any ideas? 

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