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.
Amethystinus, 4 ft.; Herveyi, 1-2 ft.; Lindleyanus, 2 ft.; Shorti, 2-4 ft.; turbinellus, 3 ft.
 
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