Describing Poppy Flowers to another player seems to be bugged.
I received the fisher quest to create a Poppy Wobbler, but was not doing any farming. Not a big problem, friends are farming.
Went through there area and found a poppy flower, brought it to them, and had them attempt to describe it to me.
Received the message "All that you were taught was already old news"
Had him attempt to teach my a few other things just in case, including poppy seeds, flax fiber, and a few other grown things and all went well, but poppy flower still failed.
Waited another day for currently growing poppy to become harvest-able and picked one, which gave me the discovery and allowed my to craft the lure.