These huge pampas grasses are a cheer-leader's pompom of whippy dark green foliage out of which rise 10-12 foot tall robust stems topped with silvery feathers.
The flowers tower over the Systematic Beds, seeming to belong more to the treescape of the Main Walk behind.
You can hear Dr Tim Upson extolling the virtues of this sometimes much-maligned plant via the link right.