A group of showy perennials, easily grown in ordinary soil, and increased by seeds and division. The best kinds include elegans, 2-4 ft.; graminifolia, a tuberous-rooted species, 2 ft.; odoratissima, 2-4 ft.; pycnos-tachya, 4 ft.; punctata, 1 ft.; scariosa, 2 ft.; spicata, 2 ft.; and squarrosa, 2-3 ft. - all with long erect racemes of bright rose-purple flowers from July to September, and all natives of North America.