Here is another weed that grows all over our neighborhood.  It is also in the genus Eupatorium.  Now this one looks a lot like Joe-Pye weed to me.  It is about 4 - 5 feet tall, and branches near the top like Joe-Pye weed.  Its flowers are more widely spaced, but the structure is similar.  Its name is Eupatorium altissimum, or Tall Boneset.  This identification came from Seek.

 

Wikipedia tells me that it is sometimes confused with Brickellia eupatorioides, or False Boneset because they both grow on limestone soils.  To confuse us further, E. altissimum has opposite leaves with 3 prominent veins, and B. eupatoioides has alternate leaves with 1 prominent vein.  I understand the language, but I have to go back to the plant to identify it.  

 

It must be Friday the 13th.  Oh, well, I will get in more steps.  OK, I checked, and it has opposite leaves and 3 prominent veins:  so, it must be Eupatorium altissimum.   FYI:  I got 700 more steps.  ;)

 

 

HAPPY GARDENING!!!