JRsbugs said:Where is it growing stone?
the leaf looks to match that of Eupatorium fistulosum.
collected the seeds in a horse pasture in Macon Georgia
KentPfeiffer said:It's almost certainly Sweetscented Joe-Pye Weed (Eutrochium purpureum). It's the only one of the genus that really tolerates dry conditions well. It also often shows opposite, rather than whorled, leaves.
KentPfeiffer said:Eutrochium purpureum is "supposed" to have whorled leaves with 4 or 5 leaves per node, but in reality there can be anything from 2 to 5. First year plants, in particular, often have just a pair of leaves at each node. These first year plants commonly bloom, even if they only get a foot or so tall.