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.
Of the fifty species known, E. angusti-folium is probably the best. It grows 36 ft. high, has willow-like leaves and spikes of crimson flowers; but there is also a very attractive whiteflowered variety. E. hirsutum, known as "Codlins and Cream", has pale pink flowers; also a white form. E. Dodoncei grows about 1 ft. high, and has rose-purple flowers; and E. rosmarinifolium, like a Rosemary bush, about 1 ft. high, has carmine blossoms.