You're not wrong, but there's a better answer!
Usually the disease attacks the upper branches first, then spreads down the length of the tree.
Fruit is a winged seed called a samara:
Leaves of the English Elm are usually ten centimeters four inches long and seven centimeters two and a half inches wide.
Ellen I'm sure you are looking at a Siberian Elm.
Elm tree seeds or samaras are very distinctive in appearance and appear on the tree soon after it flowers in spring.
In the fall.