It is fall allergy season in New Jersey. The pollen count for the next few days will be high in OG. Ragweed is the usual culprit . So, if you are having allergic symptoms, Millie may may have spotted the guilty pollen polluter.
The way it works is that pollen causes an antibody/allergen reaction in the mucus membranes of your nose, eye and throat. This causes histamine to be released, resulting in congestion, itching, etc.
Let us know if any of you are botanists and can identify Millie’s mystery plant.

PROBABLY —SEASIDE GOLDENROD — WOULD HAVE TO LOOK AT THE LEAVES–TED 2
Definitely goldenrod — a delightful and decorative plant (although a little aggressive). It is always blamed for pollen unfairly because it blooms at the same time as ragweed. Ragweed is a shorter and less noticeable plant with small white flowers and small leaves (unlike the swordlike leaves of goldenrod). Pull ragweed out when you see it, even in someone else’s garden!
And here’s a link to a site comparing the two:
http://www.extension.umn.edu/yardandgarden/ygbriefs/h530goldenrod.html