"Woody seed capsules form in autumn containing up to two-thousand seeds. "

Here is a link that might be useful: Paulownia seed

Thank you so much, this was perfect, and will be a great site to have!

Just a note , anyone interested in this gorgeous, FAST GROWING, tree; I kept reading the seeds are hard to find. Well, now I know why, the day I posted my question, my tree was loaded with the seeds, NEXT day, they were all gone! They pop open and are so tiny they are lost. I don't know what other trees do this, but I'll certainly be finding out! What a shock!

Neva, it's not just some trees...many perennial plants do the same. It's a fine line sometimes between wanting to make sure they are mature and losing them - bagging the pod/seed capsule in place on the plant with a square cut from a nylon stocking and twist tie works.