PENNISETUM. Fountain grass. Widespread, mostly in the tropics. These are mostly clumping perennial grasses with arching, narrow leaves and distinctive brushlike clusters of flowers. Both foliage and flowers can be quite colorful in some species. They are useful in drifts and borders. Some, unfortunately—the typical green leaved form of P. setaceum being a prime example—have serious invasive potential. Sun or light shade, most soils, moderate watering. Hardiness varies.
setaceum ‘Cupreum’. Fountain grass. A particularly showy form of this long-cultivated species, unfortunately rather tender outdoors. The stems are erect, with narrow 1-2' leaves. Both stems and leaves are purplish-bronze in color. Gracefully arching, red-tinged flower clusters are held above the foliage in summer and fall. ‘Eaton Canyon’ is a similar selection. It is distinguished by somewhat more slender, graceful stems, narrower leaves and a mixture of bronze and green shades. Both are striking specimens for large tubs. The first selection, at least, sets little viable seed and should have low invasive potential; the jury is still out on the second. Winter deciduous, but not reliably hardy below 25oF.