Good evening everyone. Unfortunately I don't have a photo but I wondered if anyone can ID a plant for me. I cut it back today for a friend. It had grown to about 3ft, the stems are deep red with ridges up them like bamboo. The leaves last summer were red with a lighter pink middle and the flowers were a bit like elderflowers if I remember correctly (but I could be wrong on the flowers as I don't pass her garden often). I want to say physocarpus but I know it isn't that as that's a shrub but maybe the name is similar and that's why I keep thinking physocarpus? This plant is definitely herbaceous. The new growth was just appearing this morning, deep red. Please help with any suggestions so I can start looking them up. It's driving me crazy! Thanks.