This morning the girls are bringing in a yellow--not bright like goldenrod, more like a lemon yellow--pollen that is almost dayglo or radioactive! I'm nearsighted and from 10' away I can see this stuff. They almost look like lightning bugs. I'm hoping they're not picking up something lethal, paint chips, etc.
Must be getting it from a distance away. I checked out my property and found the working cucumbers, wild onions, mint, chives, wild ageratum, and even tomatoes, but the pollen wasn't the same as what I was seeing. I'm sure there are lots of wild asters in the woods and marsh and the nursery is just down the street.
Tecumseh, out of curiosity I looked up a photo of bitterweed (also called "sneezeweed") and thought it looked like something that's all along the roadsides here. But then it said it grows only in Texas. So I went to the local extension office website and sure enough, there it was! I don't have any of the stuff on my property, but I've seen a lot of it along the creek and they could easily have gotten into it. Thanks for your input!
bitterweed is highly invasive and spreads easily. I have notice it in pastures in Texas and Louisiana so I know it not confined to just Texas. as it's name suggest it's produces bitter honey for bees and bitter milk when consumed by cows.