One outstanding plant is Digiplexis. It's a cross between two species in the Digitalis [foxglove] family. Digitalis and Isoplexis makes Digiplexis!
Since the plant is a hybrid, it puts all its energy into making flowers, not seeds. The result is a foxglove with super bright colors.
There is a 'stand' of Digiplexis in the front yard in Sausalito. They're taking full sun and loving every second!