This section is from the book "Commercial Gardening Vol4", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
A pretty Chinese bush, with purplish stems, ovate-oblong coarsely toothed leaves, and clustered deep-violet or lavender flowers in October. Hardy in the milder parts of the kingdom. Raised from seeds, cuttings, and suckers.