For some reason Listia is saying I didn't reply to your comments, so I don't know, maybe something happened. Yes they are a cousin of the willow tree! These particular ones will grow to be fairly large trees. The seeds kind of remind me of a marigold or zinnia seed in a way.
You have to put it as one word instead of two on the internet. Because the word listis **** out is not allowed to just be put freely. The pussywilllow is part of the willow tree and can get pretty big! The one tree in my daughters yard that these seeds came from is probably about 15-20 foot tall at least.