Yellow Wax Bells, Kirengeshoma palmata, are a little known but dramatic herbaceous perennial for the full to partial shade garden. A late summer bloomer, its striking clusters of pendulous bright yellow flowers bloom when just about nothing else does, making it a favorite of gardeners in the know. 
This exotic-looking perennial is a great addition to the woodland garden and can be planted under high trees. Good companion plants include ferns, hostas, astilbe. It can also be grown in a container. As I get older and travel more, I have planted more and more perennials in planters as they are lower maintenance and return year after year.
The flowers emerge in tight spherical buds and will open in 1-2 weeks after appearing. You can see some buds are tighter than others, leading to sequential opening and an extended blooming period.
French Gardener Dishes 