This section is from the book "Commercial Gardening Vol2", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
A fine North American hardy herbaceous perennial about 3-4 ft. high, with ovate lance-shaped leaves, and deep rose-purple flower heads about 4 in. across in late summer. This plant may be increased by division of the short thickish rhizomes in spring or in autumn after flowering.
Fig. 196. - Echinacea (Rudbeckia.) purpurea.