Moggs,
thanks for introducing us to this very interesting & pretty plant!
Would still like to see your whole image of the plant & surroundings.
I don't know if it will grow well here, but always worth a try.
We have forsythia from my wife's home in Connecticut, and it's doing well after 15 yrs.
Wingstem grows tall, up to 10' (!), so we should be able to find a spot in our garden for it.
Wingstem images...
https://images.search.yahoo.co...
Info:
"The stem is usually unbranched, and the fast-growing plant
can eventually reach great heights– up to
8 or 10 feet."
https://virginiawildflowers.or...
http://www.illinoiswildflowers...
Almost purchased from
https://www.prairiemoon.com/ac...
($2 for unknown number of seeds, shipping $5)
Ordered instead from Everwilde Farms Inc on Amazon
https://www.amazon.com/stores/...
400 seeds for $2.50 + $2.00 shipping.
I will happily share 20 seeds with anyone who sends me a treemail with their address.