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.
The best-known kinds are argyrea, with silvery veins; nutans, red veined; and rubro - venosa, similar. They are stove climbers, liking peaty soil, and are raised by cuttings.
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