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 handsome Chinese perennial with thickish roots, pale-green roundish leaves, and pure-white flowers in summer with a cluster of orange stamens in the centre. A somewhat tender plant, requiring warm sunny positions and protection in winter. Increased by division in spring.