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 very large genus of Australian trees, some of which are the tallest in the world, 400-500 ft. high. The best-known kinds are globulus, the "Blue Gum Tree", with large grey-green leaves. It is easily raised from seeds in a warm greenhouse, and is much used for subtropical bedding in summer. E. citriodora is a smaller-growing kind remarkable for its delicious lemon scent, almost exactly like that of the Lemon-scented Verbena (see p. 125). A few kinds are grown in the open in the mildest parts of the kingdom, one of the best for this purpose being urigera, which has attained a height of 80 ft. in places.