I'd put them in pots so you can move them to hospitable locations as the temps soar all the live-long summer. :(

Could you tell us where the plant is growing and what time of year you photographed it? That's very important when asking for help ID'ing any outdoor plant ;)

If you have enough slippage some time the plants will just go with it. Maybe you need to plant using jute erosion netting or even something like Hold A Hill blocks.

I never knew Japanese Honeysuckle spreads by seeds. It is in my area of Illinois, but I never run into it. There is a small island(Langham Island) about 30 miles south of me that is the only place in the world where the Kankakee Mallow (Iliamna remota) is endemic to, but seeds are available and I have a small patch of them. Anyway, I'm just mentioning the Island because it was neglected for decades or hundreds of years and in the 80s people got together to restore it, and the work still continues. The Island was overrun with JH and other invasive species. Years ago I would pass a couple houses that had clumps of Gooseneck Loosestrife and I thought they were absolutely beautiful, but I think I heard about it's agressive downside and so thankfully I never grew it. The Aegopodium podagraria that hitched a ride on the Daylily my brother in law gifted(?) me with was the green form. I managed to keep it confined to a small area, but it was relentless at coming back. My sisters yard was covered with the green form and she gave up fighting it. I admired the variegated form and planted it at a house that I lived in for a short time, so it never became a problem during the time that I lived there. Ive grown Jerusalem Artichoke twice. I apparently didn't learn my lesson the Ist time. I had it beat back to about 1 or 2 small plants that were a safe distance from my good perennials and it spread like crazy from just the fragment, so it's still there, but I'm working at getting rid of it once and for all, because I want to put a bog garden in that area. It was a nightmare when I had it planted in with my nice perennials. The Campsis radicans I grew did travel past the fence line into the neighbors yards which made it more difficult to kill, because if the neighbors didnt deal with it then the roots were getting stronger. I still have small shoots popping up, but I pull them out and they aren't much of a problem. I grew the native C. radicans and the Chinese C. grandiflora. I did pull up 1 grandiflora shoot while tending to my fence in the next door neighbor's yard 2 days ago. A few years ago jeekesl was mentioning how unbelievably aggressive Cynanchum laeve was, which made me more determined to grow it, and now I wished I had listened to him, because he was correct. I'm just a little shocked that in 3 years time it has traveled about 30 feet under my brick patio and is heading towards my front yard. It's most likely going to appear on the other side of the fence in the neighbors yard, and I'll need permission to treat it. I've also found it growing in a pot, which is a mystery because the vine has never produced seed pods? This spring the Honeyvine didn't emerge from the spot where I planted it, and I surmised it was killed by being too wet over the winter, but later there were suckers popping up in several locations. I have to inspect the suckers to make sure they don't have Monarch Butterfly eggs or caterpillars on them before I pull them up. I may be a glutton for punishment because I just planted a Passiflora lutea in the spot where the Cynanchum was planted, but I'm hoping it stays behaved. It's the most cold hardy Passiflora species. I grew Passiflora incarnata years ago, and the plant that I bought bloomed beautifully that first year, but for the next couple years it would throw up shoots that remained small and never grew to flowering size. I realized that it would be a nightmare if I was growing it in zone 7 or further south. So I don't have any agressive plants that spread via rhyzomes that are terribly troubling right now, only a couple plants that spread by seed which are a bit annoying. The annual Ipomoea purpurea and annual, native Ipomoea lacunosa are having a population explosion. A wild bean that I brought home and has been with me several years now, Strophostyles helvola, the native but prolific White Snakeroot, Ageratina altissima, and a white wood aster, a Eurybia species. I have too many morning glories and wild beans, but the White Snakeroot and Eurybia are gone for the most part. I like having the Ipomoea lacunosa and Strophostyles helvola, there's just too many of them. The most weedy plants spreading by seeds are Verbena bonariensis, Verbena urticifolia, Verbesina virginica, Verbesina alternifolia, Elephantopus carolinianus, Palafoxia callosa, Helenium amarum, and Prunella vulgaris. Most of these are easily pulled out, but the roots of the Verbesina and Elephantopus really dig into the soil and often require a trowel for removal. Thank you for all the enjoyable and informative responses!