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.
Many kinds of Thyme are grown for rock-garden purposes, among the best being carnosus erectus, 9 in.; the golden and silver forms of citriodorus; ericoefolius, 4 in.; lanuginosus; micans, 2 in.; Serpyllum and its varieties album, coccineum, and splendens; villosus, etc.