Well, this was a tricky puzzle! Here’s a more complete picture of this interesting plant:
This, believe it or not, is a weigela – specifically, a patented cultivar named Kolmagira. You can see part of a tag in the lower left part of this photo:
As the patent description reads, this shrub possesses “…yellow green and dark green variegated leaves with purple-colored margins…”
Some of you guessed that the leaves might be variegated due to fall senescence, or disease, or drought stress – all very good guesses. And now I’m going to reveal one of my biases (yes, I am opinionated! I know you’re surprised!)
I dislike these types of cultivars because they look environmentally stressed and/or diseased. I’m a plant stress physiologist by training, and that’s just the way I look at abnormal leaf coloration. And on a more aesthetic note, do our gardens really need these tarted-up plants? Let’s discuss it!