I just looked up images of Weigela, and that seems to be it. Thank you! ...Now to get to work with some serious pruning after it's done flowering...

OK Tamarisk. I should really know better than to make categorical statements on these forums. I'd never seen or heard reference to aster cuttings but it seems that they do work. I Googled and interestingly there are very few refs to UK sources for this method of propagation. We just divide the clumps up. I still think the bits in the photos don't look very promisimg cutting material but there's no harm in having a go.

thanks for you input on the Heptacodium miconioides (and thanks for the name of the appropriate forum - if it doesn't check out, I'll try there. K

I don't know about in OK but in the desert southwest this is a major non-native invasive along the rivers, displacing native vegetation. A while ago a beetle was introduced to help control it and over the last decade I've seen major decreases in the amount of living Tamarisk and corresponding increases in the native willows, so things are improving, at least in the areas I've visited in CO and UT. There are still many dead Tamarisks, but a better balance now.